Invalidity dossier
US 6305379
Process for producing osteoinductive bone, and osteoinductive bone produced thereby
Current assignee: Lifenet Health
Added 9/23/2026, 11:19:44 AM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
US6305379 — Patent Overview
Title: Process for producing osteoinductive bone, and osteoinductive bone produced thereby
Patent number: US6305379B1
Inventor: Lloyd Wolfinbarger, Jr.
Assignee/original assignee: Lifenet Health (earlier assignment records name "LIFENET")
Application number: US09/547,888
Filing date: 2000-04-12
Priority date: 1996-09-06 (listed as an assumption)
Publication/grant date: 2001-10-23
Status: Expired – Lifetime; anticipated expiration 2016-09-06
Purpose and plain-language scope (per the supplied text): The patent concerns a process for producing osteoinductive bone — bone capable of inducing bone formation — and the osteoinductive bone produced by that process. The excerpt's prior-art keywords point to the operative concepts: bone, osteoinductive, contacting, demineralized, and residual calcium. Consistent with those keywords, the claimed subject matter appears directed to contacting bone with a demineralizing agent and assessing or controlling residual calcium, but the excerpt supplies no claim language, so the precise steps and numerical limits are not stated here.
Classifications (as supplied): A61L27/36 and related A61L27/36xx subgroups (grafts/prostheses containing ingredients of undetermined constitution, e.g. demineralised bone matrix); A61F2/28 (bone prostheses); A61F2/4644 (preparation of bone graft, bone plugs or bone dowels); A61L27/3608 (bone, e.g. DBM, bone powder); A61L27/365 (bones); B01D11/02 subgroups (solvent extraction of solids, including fluidised beds).
Source: https://patents.google.com/patent/US6305379/en
What this excerpt does not establish: The abstract, specification, drawings, and claims are not included in the provided text, so the actual claimed steps, reagents, concentrations, and ranges cannot be stated. The excerpt also does not establish legal status as a conclusion (the page expressly states legal status is an assumption), the priority date's accuracy, or the accuracy of the assignee list. No findings are made here regarding litigation, ownership transfers, validity, or prior art, consistent with the source note that no legal analysis was performed.
(Under 400 words.)
Generated 10/1/2026, 9:53:59 PM
Cases on file (0)
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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.