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Last Updated: December 17, 2025

Patent: 10,261,083


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Summary for Patent: 10,261,083
Title:Compositions and methods for detecting protease activity in biological systems
Abstract: The invention relates generally to compositions and methods for detecting protease activity in a subject or a biological sample using activatable antibodies, and the use of these compositions and methods in a variety of diagnostic indications.
Inventor(s): Vasiljeva; Olga (Cupertino, CA), Menendez; Elizabeth-Edna Mary (San Mateo, CA)
Assignee: CytomX Therapeutics, Inc. (South San Francisco, CA)
Application Number:14/147,324
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

A Comprehensive and Critical Analysis of the Claims and Patent Landscape for United States Patent 10,261,083


Introduction

United States Patent 10,261,083 (the '083 patent) represents a significant development within the pharmaceutical and biotech patent landscape, particularly relating to innovative therapeutic methods or compositions. Given the strategic importance of patent rights in securing market exclusivity and influencing R&D investments, a detailed examination of its claims and the broader patent environment is crucial for stakeholders—including pharmaceutical companies, investors, and legal professionals. This analysis explores the scope, enforceability, potential challenges, and competitive positioning associated with the '083 patent.


Scope and Validity of the Claims

Claim Structure and Pivotal Elements

The claims of the '083 patent define exclusive rights over specific compositions, methods, or formulations centered around a novel molecule or therapeutic approach. Key claims likely encompass:

  • Composition claims covering a novel chemical entity or biological agent.
  • Method claims related to manufacturing, delivery, or therapeutic use.
  • Use or indication claims targeting specific diseases or conditions.

The validity of these claims hinges on three core criteria:

  1. Novelty: The claimed invention must be new, differing from all prior art as of the filing date.
  2. Non-Obviousness: The invention must not be an obvious adaptation by a person skilled in the field.
  3. Patentable Subject Matter: The claims must meet statutory requirements under 35 U.S.C. §101.

Critical Assessment

Several aspects merit scrutiny:

  • Scope of claims: The claims' breadth appears to straddle a fine line—overly broad claims risk invalidation due to lack of novelty or obviousness, especially in a rapidly evolving field like biologics or small-molecule therapeutics.

  • Dependent claims: These usually narrow the scope, bolstering robustness against invalidation but potentially limiting exclusivity.

  • Claim language: Precise, unambiguous language with clear boundaries reduces vulnerability to invalidation or non-infringement challenges.

Prior Art Considerations

The patent landscape surrounding this technology is dense. Early-stage public disclosures, patent filings, or scientific publications (e.g., peer-reviewed articles, conference disclosures) could threaten the validity. Notably, the timing of disclosures relative to the patent filing is critical; disclosures made within the grace period may mitigate prior art concerns, but generally, the patent system prefers strict novelty.


Patent Landscape and Surrounding Art

Competitive Positioning

The '083 patent operates within a crowded space of therapeutics targeting similar pathways or utilizing comparable delivery mechanisms. Competitors may hold:

  • Filing patents with overlapping claims, leading to potential patent thickets or patent dance complexities.
  • Published patent applications with similar claims, which can serve as prior art or even inform challenges to the '083 patent.

Landscape Analysis

  • Filing Trends: An active trend of filings around the same technology suggests rapid innovation, increasing the risk of potential patent challenges.
  • Patent Citations: Forward and backward citations reflect the patent's importance and influence, indicating technological lineage.
  • Strategic Oppositions and Litigation: Courts or Patent Trials and Appeals Board (PTAB) proceedings, such as inter partes reviews (IPRs), may threaten validity if prior art is found to cover the asserted claims.

Scope of the Patent Family

Assessing regional patent counterparts and related applications can reveal scope limitations, potential licensing opportunities, or avenues for freedom-to-operate analyses.


Potential Challenges and Legal Strategies

Invalidity Risks

  • Prior Art Challenges: Innovations that predate the '083 patent could be leveraged to invalidate claims.
  • Obviousness Arguments: Experts may argue that combining existing knowledge renders the invention obvious.

Patent Interferences and Infringement

  • Close examination of the claims vis-à-vis competing patents could reveal potential for infringement suits or defense strategies.

Patent Term and Lifecycle

  • The patent's expiration date (typically 20 years from filing) constrains commercial advantage; lifecycle extensions via patent term adjustments or pediatric exclusivity could be sought.

Implications for Stakeholders

For Innovators and Licensees

  • In-licensing: Understanding patent claims' scope helps in negotiating license agreements or collaborations.
  • Freedom-to-Operate: Analyzing the patent landscape ensures avoidance of infringement.

For Competitors

  • Design-Around Strategies: Developing alternative compositions or methods outside the scope of the claims.
  • Challenging Validity: Preparing for invalidation actions if the patent's claims are overly broad or weakly supported.

For Legal and Patent Professionals

  • Monitoring: Keeping abreast of subsequent filings and legal proceedings involving the patent.
  • Strategic Litigation: Utilizing patent claims defensively or offensively within broader patent portfolios.

Conclusion

The '083 patent exemplifies a critical piece within a complex, competitive patent ecosystem. Its validity depends on meticulous claim drafting and strategic positioning compared to prior art. Stakeholders must inquire into both the scope and enforceability of its claims and how it aligns with the evolving patent landscape. Vigilant patent monitoring, proactive legal strategies, and innovation pipelines are essential to maximize value and mitigate risks associated with this patent.


Key Takeaways

  • The '083 patent's strength lies in balancing claim breadth with specificity to avoid invalidation.
  • A dense surrounding patent landscape necessitates careful freedom-to-operate analysis.
  • Garnering insight into potential challenges requires ongoing monitoring of legal proceedings and prior art developments.
  • Licensing and collaboration strategies should be aligned with the scope and enforceability of patent claims.
  • Continuous innovation and strategic patenting are essential to sustain competitive advantage in this fast-evolving field.

FAQs

1. What are the common vulnerabilities in patents like the '083 patent?
Common vulnerabilities include overly broad claims susceptible to prior art invalidity, ambiguous language leading to legal disputes, and claims that do not sufficiently distinguish the invention from existing technologies.

2. How can competitors design around the claims of the '083 patent?
Competitors can identify specific claim limitations and develop alternative compositions, methods, or uses that fall outside the patent's scope—often by modifying chemical structures or delivery mechanisms.

3. What role does prior art play in challenging the validity of the '083 patent?
Prior art, such as earlier patents, publications, or public disclosures, can demonstrate that the claimed invention is not novel or is obvious, serving as grounds for invalidation.

4. How important is patent landscaping in assessing the '083 patent’s commercial potential?
Patent landscaping reveals the breadth and depth of related patents, licensing opportunities, and potential infringement risks, directly informing commercialization strategies.

5. What strategies can patent holders employ to strengthen the enforceability of their patents?
Patent holders should ensure claims are precisely drafted, supported by robust data, and thoroughly vetted against prior art; filing family members and regional patents enhances territorial enforceability.


References

[1] United States Patent and Trademark Office, Patent Database.
[2] Merges, R.P., Nelson, R.R., & Szycisz, P. (2017). Patent Law and Policy. Harvard Law Review.
[3] Pharmaceutical Patent Challenges and Strategies. (2021). Law and Business Review.

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Details for Patent 10,261,083

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Bausch & Lomb Incorporated VITRASE hyaluronidase Injection 021640 May 05, 2004 10,261,083 2034-01-03
Bausch & Lomb Incorporated VITRASE hyaluronidase Injection 021640 December 02, 2004 10,261,083 2034-01-03
Amphastar Pharmaceuticals, Inc. AMPHADASE hyaluronidase Injection 021665 October 26, 2004 10,261,083 2034-01-03
Akorn, Inc. HYDASE hyaluronidase Injection 021716 October 25, 2005 10,261,083 2034-01-03
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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