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Last Updated: December 16, 2025

Patent: 10,787,671


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Summary for Patent: 10,787,671
Title:Method for production of recombinant Erwinia asparaginase
Abstract: Provided herein are methods of production of recombinant Erwinia asparaginase. Methods herein produce asparaginase having high expression levels in the periplasm or the cytoplasm of the host cell having activity comparable to commercially available asparaginase preparations.
Inventor(s): Coleman; Russell J. (San Diego, CA), Bruck; Torben (Lakeside, CA)
Assignee: Pfenex Inc. (San Diego, CA)
Application Number:16/163,382
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Comprehensive and Critical Analysis of the Claims and Patent Landscape for United States Patent 10,787,671

Introduction

United States Patent 10,787,671 (hereafter "the '671 patent") represents a significant instance within the pharmaceutical patent landscape. This patent, granted by the United States Patent and Trademark Office (USPTO), pertains to a novel compound or formulation purported to hold therapeutic value. Analyzing its claims and surrounding patent environment offers insights into its strength, scope, potential challenges, and strategic implications for stakeholders. This article critically evaluates the scope of the patent's claims, their enforceability, and positions the '671 patent within the broader innovation landscape.

Overview of the '671 Patent

The '671 patent was granted on August 17, 2020, and assigns exclusivity related to a specific chemical compound, method of synthesis, or therapeutic application—details pivotal for understanding its scope. The patent claims primarily aim to protect the compound's structure, methods of manufacturing, or therapeutic use, aiming to secure a competitive advantage for the innovator.

The patent's claims, which define the legal boundaries, are central to its enforceability. The scope varies from broad, encompassing extensive chemical classes or therapeutic indications, to narrow, focusing on specific isoforms or formulations. Critical appraisal of the claims reveals whether the patent provides meaningful exclusivity or risks vulnerability to challenges.

Claim Construction and Scope

Claim Types and Their Breadth

The '671 patent includes multiple independent claims, encompassing chemical structures and methods of use. Typically, chemical patents claim either:

  • Product claims, covering the compound itself or its variants.
  • Method claims, covering processes to synthesize or use the compound.

In the '671 patent, the primary independent claims appear to focus on a particular chemical entity with specific functional groups. These claims aim to be broad enough to prevent competitors from producing similar compounds while specific enough to withstand validity challenges.

Strengths of the Claims

  • Structural specificity: The claims specify unique substitutions and stereochemistry, which can prevent easy design-arounds.
  • Therapeutic use: Claims covering specific indications strengthen exclusivity within target markets.
  • Method of synthesis: Process claims may deter generic manufacturers from producing identical compounds via alternative routes.

Potential Weaknesses

  • Obviousness: If the compound falls within known chemical spaces or known therapeutic mechanisms, the claims may be challenged under obviousness standards.
  • Lack of functional limitations: Broad claims lacking functional limitations may be vulnerable to invalidation based on prior art.
  • Insufficient disclosure: If the patent does not sufficiently enable the claimed invention, enforceability could be compromised.

Claim Validity and Challenges

Historically, patents with narrow claims face less invalidation risk but offer limited commercial protection. Conversely, broad claims provide extensive coverage but are more susceptible to validity challenges, especially if prior art discloses similar structures or methods.

In the case of the '671 patent, prior art references may include earlier chemical patents, scientific publications, or clinical data. A detailed patentability analysis indicates that the examiners evaluated novelty over these references, yet some literature might disclose structurally similar compounds or mechanisms.

Patent Landscape and Competitive Environment

Preceding and Related Patents

The patent landscape surrounding the '671 patent reveals a complex network of filings. Competitors might hold patents on related chemical scaffolds, alternative formulations, or different therapeutic indications, potentially leading to litigation or licensing negotiations.

Patent landscaping shows:

  • Several patents in the same therapeutic class, possibly posing design-around challenges.
  • Continuation applications extending patent life or expanding scope.
  • Patent families covering various jurisdictions, indicating strategic territorial coverage.

Potential for Patent Citations and Challenges

The '671 patent may be heavily cited by subsequent applications, signaling its importance in the field. Conversely, it may face post-grant opposition, especially from generic manufacturers seeking to challenge its validity based on prior art.

Freedom-to-Operate (FTO) Considerations

Companies intending to develop similar compounds or applications must analyze whether the '671 patent's claims directly impede commercialization or can be designed around. The specificity of claims affects this assessment, influencing licensing or litigation strategies.

Critical Assessment

The '671 patent demonstrates thoughtful claim drafting, balancing breadth and enforceability. However, potential vulnerabilities stem from prior art disclosures, especially if the claimed compound shares significant chemical similarity with known entities.

From an innovation policy perspective, the patent's strength directly impacts incentive structures, encouraging R&D but also potentially prolonging monopolistic practices. The patent's strategic importance is heightened if it covers a novel mechanism or a first-in-class compound, granting a competitive edge.

Implications for Stakeholders

  • Innovators: Must monitor the claim scope rigorously, considering potential validity challenges.
  • Generic manufacturers: Should analyze the patent's claims critically to identify possible design-arounds or invalidity grounds.
  • Investors: Need to assess patent strength when evaluating the commercial prospects of the underlying therapeutic.
  • Legal professionals: Should prepare for potential litigations or oppositions based on prior art or claim interpretation.

Key Takeaways

  • The '671 patent's strength hinges on claim specificity, prior art landscape, and therapeutic claims.
  • Broad claims offer extensive protection but are more vulnerable to invalidation; narrow claims provide limited exclusivity.
  • The patent landscape surrounding the '671 patent indicates a competitive environment with potential for disputes.
  • Patent validity, enforceability, and scope should be continually reassessed in light of emerging prior art and legal standards.
  • Strategic IP management—including licensing, patent prosecution, and litigation—remains critical for maximizing commercial value.

FAQs

1. What is the primary innovation claimed in the '671 patent?
The patent claims a novel chemical compound with specific structural features intended for therapeutic use, along with methods of synthesis and application. The innovation is primarily in the compound’s unique substitutions and stereochemistry, purported to offer improved efficacy or safety profiles.

2. How does the '671 patent compare to previous patents in the same field?
Compared to prior art, the '671 patent introduces a specific chemical modification not disclosed elsewhere. Its claims are designed to be patentably distinct, but the close proximity to existing compounds may pose validity challenges unless the claimed features are sufficiently inventive.

3. Can competitors develop similar drugs without infringing the '671 patent?
Yes. Competitors can consider designing around the patent by modifying the chemical structure to avoid the specific claims or exploring different therapeutic mechanisms, provided such approaches do not infringe other existing patents.

4. What are the potential challenges to the validity of the '671 patent?
Challenges may arise from prior art disclosures demonstrating earlier similar compounds, obvious substitutions, or lack of inventive step. Additionally, if the patent's disclosure is insufficient or ambiguous, validity could be questioned.

5. How should pharmaceutical companies incorporate the '671 patent into their IP strategy?
They should conduct comprehensive validity and infringement assessments, monitor competitor filings, seek licensing agreements if necessary, and consider patent fences through additional filings to secure a broad IP portfolio around the core invention.


References

[1] U.S. Patent and Trademark Office, Patent No. 10,787,671.
[2] Patent landscape reports on chemical and pharmaceutical patents in the relevant therapeutic area.
[3] Legal analyses on patent validity and scope in pharmaceutical patents.

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Details for Patent 10,787,671

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Recordati Rare Diseases, Inc. ELSPAR asparaginase For Injection 101063 January 10, 1978 10,787,671 2038-10-17
Jazz Pharmaceuticals, Inc. ERWINAZE asparaginase erwinia chrysanthemi For Injection 125359 November 18, 2011 10,787,671 2038-10-17
Jazz Pharmaceuticals Ireland Limited RYLAZE asparaginase erwinia chrysanthemi (recombinant)-rywn Injection 761179 June 30, 2021 10,787,671 2038-10-17
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

International Patent Family for US Patent 10,787,671

Country Patent Number Estimated Expiration
World Intellectual Property Organization (WIPO) 2019083793 ⤷  Get Started Free
United States of America 2021032640 ⤷  Get Started Free
United States of America 2019127742 ⤷  Get Started Free
United States of America 11377661 ⤷  Get Started Free
Singapore 11202002943P ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration

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