Invalidity dossier
US 9124552
Filtering network data transfers
Current assignee: Centripetal Networks LLC
Added 9/20/2026, 5:18:49 AM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US9124552B2 — "Filtering Network Data Transfers"
Bibliographic data (from supplied text)
- Patent number: US9124552B2
- Application number: US13/795,822; publication US20140283004A1
- Inventor: Sean Moore
- Original assignee: Centripetal Networks LLC (current assignee listed as Centripetal Networks LLC)
- Priority/filing date: 2013-03-12; publication date: 2015-09-01
- Legal status: Expired – Fee Related; adjusted expiration 2033-03-21
- Classifications include H04L63/0227 (filtering policies), H04L63/0254 (stateful filtering), H04L63/0236 (filtering by address/protocol/port/URL), H04L63/0245 (filtering by payload information), H04L63/0263 (rule management), H04L69/22 (parsing or analysis of headers), and H04L67/02 (HTTP-based protocols).
Purpose and plain-language scope
The patent addresses filtering network data transfers — protecting a secured network by enforcing network usage or network security policies, including preventing data exfiltration. FIG. 3 is described as illustrating an exemplary dynamic security policy with operators that filter on data transfer protocol, or application-layer protocol, header information. FIG. 4 illustrates an exemplary method for protecting a secured network by enforcing one or more network usage or network security policies. The excerpt notes stateful filtering and rule application: "rule 7 314 may be applied to the portion of received packets that do not have packet header field values that correspond to rule 5 310 (e.g., each of the portion of the received packets may be blocked from contin[uing])…" The methods may extend beyond HTTP and HTTPS to other data transfer or application-layer protocols, with FTP and XMPP given as examples, and may be used for purposes other than network policy enforcement and exfiltration prevention.
What the excerpt does not establish
The supplied text is an excerpt. It does not include the full claims, complete written description, drawings, or the full text of the FIG. 3 example policy or FIG. 4 method. It therefore does not establish claim scope, all rules/operators disclosed, or the full set of protocols covered. The excerpt lists litigation and reassignment entries, but per instructions those are not analyzed here.
Source: https://patents.google.com/patent/[US9124552](/patent/US9124552)/en
Generated 10/1/2026, 10:02:52 PM
Cases on file (0)
Specific litigation cases in our database that name US patent 9124552. The free-form analysis below may also discuss cases beyond this list.
No cases on file mention this patent. Upload a CSV or add a case manually in Admin → Manage litigation cases.
Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
Proceedings on file (0)
All PTAB activity →AIA trial proceedings (IPR / PGR / CBM) filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced from the USPTO Open Data Portal and refreshed every six hours; each proceeding number deep-links to the PTAB E2E docket.
No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
Prior art
Earlier patents, publications, and products that may anticipate or render the claims unpatentable.
Obviousness
Combinations of prior art that suggest the claimed invention would have been obvious under 35 U.S.C. § 103.
Extensions
Patent term adjustments, term extensions, continuations, divisionals, family members, and expiration dates.
Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.