Asserter profile

Merrimack Pharmaceuticals, Inc.

operating company2 patents now12 ever0 cases filed during tenure16 connections

Also seen as: MERRIMACK PHARMACEUTICALS, INC.

PTAB exposure

1of this entity’s patents have been challenged at PTAB (2 total proceedings). 1 had claims invalidated.

Final written decisions are public record. The invalidation grounds usually carry over as § 102 / § 103 ammunition in district court — see IPR estoppel.

Two-hop network

Edges marked ⚖️ overlap with at least one infringement suit filed during the receiving entity’s tenure with the patent. Bold-bordered = this entity. Red = NPE; orange = shell LLC; green = defensive aggregator; blue = operating company.

flowchart LR
    Nmerrimack_pharmaceuticals["Merrimack Pharmaceuticals, Inc."]
    Nkalra_ashish_blanchette_sarah_f_fitzgerald_jonathan_basil_le["Kalra, Ashish; Blanchette, Sarah F.; Fi…"]
    Nipsen_biopharm["Ipsen Biopharm Ltd."]
    Nkim_jaeyeon_niyikiza_clet_moyo_victor_bayever_eliel_fitzgera["KIM, Jaeyeon; NIYIKIZA, Clet; MOYO, Vic…"]
    Ndaryl_c_drummond_dmitri_b_kirpotin_mark_eamon_hayes_charles_["Daryl C. Drummond, Dmitri B. Kirpotin,…"]
    Ndaryl_c_drummond_dmitri_b_kirpotin_mark_e_hayes_charles_nobl["Daryl C. Drummond, Dmitri B. Kirpotin,…"]
    Njaeyeon_kim_clet_niyikiza_victor_moyo_eliel_bayever_jonathan["Jaeyeon Kim; Clet Niyikiza; Victor Moyo…"]
    Neliel_bayever_navreet_dhindsa_jonathan_basil_fitzgerald_pete["Eliel Bayever; Navreet Dhindsa; Jonatha…"]
    Nniyikiza_clet_moyo_victor_bayever_eliel_fitzgerald_jonathan_["Niyikiza, Clet; Moyo, Victor; Bayever,…"]
    Nu_s_bank_national_association_as_collateral_agent["U.S. BANK TRUST COMPANY, NATIONAL ASSOC…"]
    Nkim_jaeyeon["Kim, Jaeyeon"]
    Nu_s_bank_national_association["U.S. Bank National Association"]
    Ndhindsa_navreet_laivins_peter_n_bayever_eliel_fitzgerald_jon["Dhindsa, Navreet; Laivins, Peter N.; Ba…"]
    Nclet_niyikiza_victor_moyo_eliel_bayever_jonathan_basil_fitzg["Clet Niyikiza; Victor Moyo; Eliel Bayev…"]
    Nhermes_biosciences["Hermes Biosciences, Inc."]
    Neliel_bayever_navreet_dhindsa_jonathan_basil_fitzgerald_pete["Eliel Bayever; Navreet Dhindsa; Jonatha…"]
    Njaeyeon_kim["Jaeyeon Kim"]
    Ndish_l_l_c_and_others["DISH Technologies L.L.C. (and others)"]
    Ndish_l_l_c_and_other_dish_entities["DISH Technologies L.L.C. (and other DIS…"]
    Nhydrafacial["HYDRAFACIAL LLC"]
    Nbest_pump_and_flow_fts_services_profrac_services_u_s_well_se["BEST PUMP AND FLOW, LLC; FTS INTERNATIO…"]
    Ndish_broadcasting_dish_network_l_l_c_dish_l_l_c["DISH BROADCASTING CORPORATION, DISH NET…"]
    Nwolfspeed["WOLFSPEED, INC."]
    Ninsite_vision["InSite Vision Incorporated"]
    Nmicron_technology["Micron Technology, Inc."]
    Nwestern_digital["Western Digital Technologies, Inc."]
    Naspect_software_firstpoint_contact["Aspect Software, Inc.; FirstPoint Conta…"]
    Nuniversal_electronics["Universal Electronics Inc."]
    Nsmart_modular["SMART Modular Technologies, Inc."]
    Natc["ATC TECHNOLOGIES, LLC"]
    Nprestolite_wire["Prestolite Wire Corporation"]
    Nholley_performance_products_holley_performance_systems_weian["Holley Performance Products Inc.; Holle…"]
    Nholley_performance_products_holley_performance_systems_weian["Holley Performance Products Inc.; Holle…"]
    Naccel_performance["ACCEL Performance Group LLC"]
    Nlytx["LYTX, INC."]
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_["Cavion, Inc.; Celator Pharmaceuticals,…"]
    Ncelator_pharmaceuticals_cavion_jazz_pharmaceuticals_ireland_["Celator Pharmaceuticals, Inc.; Cavion,…"]
    Njazz_pharmaceuticals_jazz_pharmaceuticals_ireland_celator_ph["Jazz Pharmaceuticals, Inc.; Jazz Pharma…"]
    Ncynosure_palomar_medical["Cynosure, LLC; Palomar Medical Technolo…"]
    Npalomar_medical_cynosure["Palomar Medical Technologies, LLC; Cyno…"]
    Nsperry_and_hutchinson["SPERRY AND HUTCHINSON COMPANY, INC."]
    Naspect_software["Aspect Software, Inc."]
    Ndrummond_daryl_c_hong_keelung_kirpotin_dmitri["Drummond, Daryl C.; Hong, Keelung; Kirp…"]
    Nkalra_ashish_blanchette_sarah_f_fitzgerald_jonathan_basil_le -->|"2017 · Assignment · 11344552"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals ==>|"⚖️ 2017 · Assignment · 11344552"| Nipsen_biopharm
    Nkim_jaeyeon_niyikiza_clet_moyo_victor_bayever_eliel_fitzgera -->|"2023 · Assignment · 12364691"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals ==>|"⚖️ 2023 · Assignment · 12364691"| Nipsen_biopharm
    Ndaryl_c_drummond_dmitri_b_kirpotin_mark_eamon_hayes_charles_ -->|"2021 · Assignment · 10993914"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals ==>|"⚖️ 2021 · Assignment · 10993914"| Nipsen_biopharm
    Nmerrimack_pharmaceuticals -->|"2017 · Assignment · 12059497"| Nipsen_biopharm
    Ndaryl_c_drummond_dmitri_b_kirpotin_mark_e_hayes_charles_nobl -->|"2021 · Assignment · 12059497"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2017 · Assignment · 11369597"| Nipsen_biopharm
    Nkim_jaeyeon_niyikiza_clet_moyo_victor_bayever_eliel_fitzgera -->|"2021 · Assignment · 11369597"| Nmerrimack_pharmaceuticals
    Njaeyeon_kim_clet_niyikiza_victor_moyo_eliel_bayever_jonathan -->|"2020 · Assignment · 10980795"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals ==>|"⚖️ 2020 · Assignment · 10980795"| Nipsen_biopharm
    Nmerrimack_pharmaceuticals ==>|"⚖️ Assignment · 10980795"| Nipsen_biopharm
    Neliel_bayever_navreet_dhindsa_jonathan_basil_fitzgerald_pete -->|"2017 · Assignment · 9717724"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2017 · Assignment · 9717724"| Nipsen_biopharm
    Nmerrimack_pharmaceuticals ==>|"⚖️ 2017 · Change of Address · 9717724"| Nipsen_biopharm
    Nniyikiza_clet_moyo_victor_bayever_eliel_fitzgerald_jonathan_ -->|"2015 · Assignment · 9492442"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2015 · Security Agreement · 9492442"| Nu_s_bank_national_association_as_collateral_agent
    Nkim_jaeyeon -->|"2016 · Assignment · 9492442"| Nmerrimack_pharmaceuticals
    Nu_s_bank_national_association -->|"2017 · Release · 9492442"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2017 · Assignment · 9492442"| Nipsen_biopharm
    Nmerrimack_pharmaceuticals ==>|"⚖️ 2017 · Change of Address · 9492442"| Nipsen_biopharm
    Nniyikiza_clet_moyo_victor_bayever_eliel_fitzgerald_jonathan_ -->|"2015 · Assignment · 9452162"| Nmerrimack_pharmaceuticals
    Ndhindsa_navreet_laivins_peter_n_bayever_eliel_fitzgerald_jon -->|"2015 · Assignment · 9452162"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2015 · Security Agreement · 9452162"| Nu_s_bank_national_association_as_collateral_agent
    Nkim_jaeyeon -->|"2016 · Assignment · 9452162"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2017 · Assignment · 9452162"| Nipsen_biopharm
    Nu_s_bank_national_association -->|"2017 · Release · 9452162"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals ==>|"⚖️ 2017 · Change of Address · 9452162"| Nipsen_biopharm
    Nclet_niyikiza_victor_moyo_eliel_bayever_jonathan_basil_fitzg -->|"2015 · Assignment · 9339497"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2015 · Security Agreement · 9339497"| Nu_s_bank_national_association_as_collateral_agent
    Nkim_jaeyeon -->|"2016 · Assignment · 9339497"| Nmerrimack_pharmaceuticals
    Nu_s_bank_national_association -->|"2017 · Release · 9339497"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2017 · Assignment · 9339497"| Nipsen_biopharm
    Nmerrimack_pharmaceuticals ==>|"⚖️ 2017 · Change of Address · 9339497"| Nipsen_biopharm
    Nhermes_biosciences -->|"2012 · Merger · 8329213"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2015 · Security Interest · 8329213"| Nu_s_bank_national_association_as_collateral_agent
    Nu_s_bank_national_association_as_collateral_agent -->|"2017 · Release · 8329213"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2017 · Assignment · 8329213"| Nipsen_biopharm
    Nmerrimack_pharmaceuticals ==>|"⚖️ 2017 · Change of Address · 8329213"| Nipsen_biopharm
    Neliel_bayever_navreet_dhindsa_jonathan_basil_fitzgerald_pete -->|"2015 · Assignment · 9364473"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2015 · Security Agreement · 9364473"| Nu_s_bank_national_association_as_collateral_agent
    Njaeyeon_kim -->|"2016 · Assignment · 9364473"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals -->|"2017 · Assignment · 9364473"| Nipsen_biopharm
    Nu_s_bank_national_association_as_collateral_agent -->|"2017 · Release · 9364473"| Nmerrimack_pharmaceuticals
    Nmerrimack_pharmaceuticals ==>|"⚖️ 2017 · Change of Address of Assignee · 9364473"| Nipsen_biopharm
    Ndish_l_l_c_and_others -->|"2021 · Security Interest · 8868772"| Nu_s_bank_national_association_as_collateral_agent
    Ndish_l_l_c_and_other_dish_entities -->|"2021 · Security Interest · 8868772"| Nu_s_bank_national_association_as_collateral_agent
    Nhydrafacial -->|"2025 · Patent Security Agreement · 9550052"| Nu_s_bank_national_association_as_collateral_agent
    Nbest_pump_and_flow_fts_services_profrac_services_u_s_well_se -->|"2024 · Intellectual Property Security Agreement · 11211801"| Nu_s_bank_national_association_as_collateral_agent
    Nbest_pump_and_flow_fts_services_profrac_services_u_s_well_se -->|"2024 · Intellectual Property Security Agreement · 11009162"| Nu_s_bank_national_association_as_collateral_agent
    Nbest_pump_and_flow_fts_services_profrac_services_u_s_well_se -->|"2024 · Security Agreement · 11668420"| Nu_s_bank_national_association_as_collateral_agent
    Ndish_broadcasting_dish_network_l_l_c_dish_l_l_c -->|"2021 · Security Agreement · 10469554"| Nu_s_bank_national_association_as_collateral_agent
    Ndish_broadcasting_dish_network_l_l_c_dish_l_l_c -->|"2021 · Security Agreement · 10469554"| Nu_s_bank_national_association_as_collateral_agent
    Nwolfspeed -->|"2025 · Security Interest · 10886396"| Nu_s_bank_national_association_as_collateral_agent
    Nu_s_bank_national_association_as_collateral_agent -->|"2025 · Release of Security Interest · 10886396"| Nwolfspeed
    Nwolfspeed -->|"2025 · NOTICE OF GRANT OF SECURITY INTEREST IN INTELLECTUAL PROPERTY · 10998418"| Nu_s_bank_national_association_as_collateral_agent
    Nu_s_bank_national_association_as_collateral_agent ==>|"⚖️ 2025 · RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY COLLATERAL · 10998418"| Nwolfspeed
    Nwolfspeed -->|"2025 · Security Interest · 8169005"| Nu_s_bank_national_association_as_collateral_agent
    Nu_s_bank_national_association_as_collateral_agent -->|"2025 · Release · 8169005"| Nwolfspeed
    Nwolfspeed -->|"2025 · Assignment (Security Interest) · 11888392"| Nu_s_bank_national_association_as_collateral_agent
    Nu_s_bank_national_association_as_collateral_agent -->|"2025 · Assignment (Release of Security Interest) · 11888392"| Nwolfspeed
    Ninsite_vision -->|"2014 · Security Agreement · 8778999"| Nu_s_bank_national_association_as_collateral_agent
    Nmicron_technology -->|"2016 · Security Interest · 10431282"| Nu_s_bank_national_association_as_collateral_agent
    Nu_s_bank_national_association_as_collateral_agent -->|"2018 · Release · 10431282"| Nmicron_technology
    Nmicron_technology -->|"2016 · Security Agreement · 10168233"| Nu_s_bank_national_association_as_collateral_agent
    Nu_s_bank_national_association_as_collateral_agent -->|"2018 · Release · 10168233"| Nmicron_technology
    Nwestern_digital -->|"2016 · Security Agreement · 8113873"| Nu_s_bank_national_association_as_collateral_agent
    Nu_s_bank_national_association_as_collateral_agent -->|"2018 · Release · 8113873"| Nwestern_digital
    Nmicron_technology -->|"2016 · Security Agreement · 8369168"| Nu_s_bank_national_association_as_collateral_agent
    Nmicron_technology -->|"2017 · Correction · 8369168"| Nu_s_bank_national_association_as_collateral_agent
    Nu_s_bank_national_association_as_collateral_agent -->|"2018 · Release · 8369168"| Nmicron_technology
    Nmicron_technology -->|"2016 · Security Agreement · 5936380"| Nu_s_bank_national_association_as_collateral_agent
    Nu_s_bank_national_association_as_collateral_agent -->|"2018 · Release · 5936380"| Nmicron_technology
    Naspect_software_firstpoint_contact -->|"2010 · Security Interest · 6760745"| Nu_s_bank_national_association_as_collateral_agent
    Nwolfspeed -->|"2023 · Security Interest · 10886396"| Nu_s_bank_national_association
    Nwolfspeed -->|"2023 · SECURITY AGREEMENT · 10998418"| Nu_s_bank_national_association
    Nwolfspeed -->|"2023 · Security Interest · 8169005"| Nu_s_bank_national_association
    Nwolfspeed -->|"2023 · Assignment (Security Interest) · 11888392"| Nu_s_bank_national_association
    Nuniversal_electronics -->|"2024 · Security Interest · 10930276"| Nu_s_bank_national_association
    Nu_s_bank_national_association -->|"2015 · Release · 8778999"| Ninsite_vision
    Nu_s_bank_national_association -->|"2011 · Release · 8250295"| Nsmart_modular
    Natc -->|"2022 · Security Interest · 7149526"| Nu_s_bank_national_association
    Nprestolite_wire -->|"2007 · Security Agreement · 5088464"| Nu_s_bank_national_association
    Nu_s_bank_national_association -->|"2012 · Release · 5088464"| Nprestolite_wire
    Nholley_performance_products_holley_performance_systems_weian -->|"2006 · Security Agreement · 4798190"| Nu_s_bank_national_association
    Nu_s_bank_national_association -->|"2010 · Release · 4798190"| Nholley_performance_products_holley_performance_systems_weian
    Nprestolite_wire -->|"2007 · Security Agreement · 5444628"| Nu_s_bank_national_association
    Nu_s_bank_national_association -->|"2015 · Release · 5444628"| Naccel_performance
    Nu_s_bank_national_association -->|"2017 · Release by Secured Party · 6718239"| Nlytx
    Nu_s_bank_national_association -->|"2017 · Release · 5497419"| Nlytx
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 7668730"| Nu_s_bank_national_association
    Ncelator_pharmaceuticals_cavion_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 8731963"| Nu_s_bank_national_association
    Njazz_pharmaceuticals_jazz_pharmaceuticals_ireland_celator_ph -->|"2021 · Security Agreement · 8589182"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 8457988"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 7895059"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 11147782"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 10758488"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 9486426"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 9050302"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 8772306"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 11077079"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 10864181"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 10213400"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 10966931"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 10959956"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 10813885"| Nu_s_bank_national_association
    Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ -->|"2021 · Security Agreement · 8461203"| Nu_s_bank_national_association
    Ncynosure_palomar_medical -->|"2020 · Security Agreement · 7427289"| Nu_s_bank_national_association
    Nu_s_bank_national_association -->|"2024 · Release · 7427289"| Npalomar_medical_cynosure
    Nu_s_bank_national_association -->|"Release · 4833308"| Nsperry_and_hutchinson
    Nu_s_bank_national_association -->|"2016 · Release of Security Interest · 6760745"| Naspect_software
    Ndrummond_daryl_c_hong_keelung_kirpotin_dmitri -->|"2014 · Assignment · 8329213"| Nhermes_biosciences
    classDef focal fill:#fef3c7,stroke:#92400e,stroke-width:3px,color:#1c1917
    classDef npe fill:#fee2e2,stroke:#be123c,stroke-width:2px,color:#1c1917
    classDef shell fill:#fed7aa,stroke:#9a3412,stroke-width:2px,color:#1c1917
    classDef defensive fill:#dcfce7,stroke:#15803d,stroke-width:2px,color:#1c1917
    classDef operating fill:#e0f2fe,stroke:#075985,stroke-width:1px,color:#1c1917
    class Nmerrimack_pharmaceuticals focal
    class Nipsen_biopharm operating
    class Nu_s_bank_national_association_as_collateral_agent operating
    class Nu_s_bank_national_association operating
    class Nhermes_biosciences operating
    class Ndish_l_l_c_and_others operating
    class Ndish_l_l_c_and_other_dish_entities operating
    class Nhydrafacial operating
    class Nbest_pump_and_flow_fts_services_profrac_services_u_s_well_se operating
    class Ndish_broadcasting_dish_network_l_l_c_dish_l_l_c operating
    class Nwolfspeed operating
    class Ninsite_vision operating
    class Nmicron_technology operating
    class Nwestern_digital operating
    class Naspect_software_firstpoint_contact operating
    class Nuniversal_electronics operating
    class Nsmart_modular operating
    class Natc shell
    class Nprestolite_wire operating
    class Nholley_performance_products_holley_performance_systems_weian operating
    class Naccel_performance operating
    class Nlytx operating
    class Ncavion_celator_pharmaceuticals_jazz_pharmaceuticals_ireland_ operating
    class Ncelator_pharmaceuticals_cavion_jazz_pharmaceuticals_ireland_ operating
    class Njazz_pharmaceuticals_jazz_pharmaceuticals_ireland_celator_ph operating
    class Ncynosure_palomar_medical operating
    class Npalomar_medical_cynosure operating
    class Nsperry_and_hutchinson operating
    class Naspect_software operating

Patents currently held (2)

Patents previously held (10)

Connected entities (16)

Correspondent attorneys (1)

Attorneys / firms recorded with USPTO when this entity received a patent. Recurrence is the signal — many firms do both NPE and operating-company patent work, so a single appearance doesn’t mean much.