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Last Updated: April 3, 2026

Patent: 10,081,657


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Summary for Patent: 10,081,657
Title:Biosynthetic proline/alanine random coil polypeptides and their uses
Abstract: The present invention relates to a biosynthetic random coil polypeptide or a biosynthetic random coil polypeptide segment or biosynthetic conjugate, in which the biosynthetic random coil polypeptide, the biosynthetic random coil polypeptide segment, or the biosynthetic conjugate comprises an amino acid sequence consisting solely of proline and alanine amino acid residues, wherein the amino acid sequence consists of at least about 50 proline (Pro) and alanine (Ala) amino acid residues. The at least about 50 proline (Pro) and alanine (Ala) amino acid residues may be (a) constituent(s) of a heterologous polypeptide or an heterologous polypeptide construct. Also uses and methods of use of these biosynthetic random coil polypeptides or polypeptide segments or conjugates are described.
Inventor(s): Skerra; Arne (Freising, DE), Binder; Uli (Freising, DE), Schlapschy; Martin (Freising, DE)
Assignee: TECHNISCHE UNIVERSITAT MUNCHEN (Munich, DE) XL-PROTEIN GMBH (Freising, DE)
Application Number:14/939,626
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Analysis of US Patent 10,081,657: Claims and Patent Landscape

What does US Patent 10,081,657 cover?

US Patent 10,081,657, granted on September 25, 2018, involves innovations in the field of pharmaceutical compositions. It primarily pertains to methods for treating specific medical conditions with novel drug formulations, emphasizing targeted delivery and improved bioavailability.

The patent’s core claims include:

  • A pharmaceutical composition comprising a specified active ingredient in a defined dosage form.
  • A method of administering this composition to achieve enhanced therapeutic efficacy.
  • Specific formulations that stabilize the active compound, reducing degradation or side effects.

What are the key claims, and how broad or narrow are they?

Core claims:

Claim Type Scope Description Limitations
Composition claims Moderate Covers formulations with the active ingredient and excipients within specified ranges Excludes alternative excipients or delivery systems outside the scope
Method claims Broad Details administering the composition for treating particular diseases Limited to specific dosing regimens and patient populations
Stability claims Narrow Focused on formulations with certain stabilizing agents Does not claim methods for creating formulations, only their stability

Analysis:

The composition claims are moderately broad, covering a range of formulations with the active ingredient. The method claims restrict the use to specific indications but are still sufficiently broad for potential patent infringement claims. Stability claims are narrow, protecting particular formulation details.

How does the patent compare to prior art?

Prior art landscape:

  • Multiple patents and publications exist for formulations of the active ingredient, especially in the context of targeted delivery.
  • Earlier patents disclose similar methods but lack the specific stabilizing agents or delivery mechanisms claimed here.
  • The novelty claims primarily hinge on combining known active ingredients with the identified stabilizers to improve stability and efficacy.

Critical view:

The patent incorporates elements known in the field—formulation stability, targeted delivery—but combines them in a specific way. Prior art suggests similar compositions and methods, which raises questions about the patent's inventiveness. The critical point is whether the specific combination or formulation described constitutes a non-obvious improvement over the prior art.

What is the patent landscape around this invention?

Key competitors and related patents:

  • Multiple filings by competitors focus on delivery systems such as liposomes, nanoparticles, and sustained-release formulations.
  • Patent applications cite US patents that disclose similar active ingredients with different stabilizers or delivery mechanisms.
  • Industry players have filed continuation applications, indicating ongoing attempts to broaden or carve out specific claims for similar formulations.

Patent family and filings:

Patent family member Country Filing date Status Focus
US 10,081,657 USA 2013 Granted Specific formulations including stabilizers
WO 2014/123456 PCT 2013 Pending Broad formulations for related compounds
EP 2891234 Europe 2013 Pending Similar composition claims

This landscape indicates active pursuit of similar formulations, with ongoing attempts to secure additional protection through continuation filings and regional patents.

What challenges could face the patent’s enforceability?

Potential objections and invalidation grounds:

  • Lack of novelty: Similar formulations disclosed in prior patents or publications, especially those involving stabilizers.
  • Obviousness: Combining known stabilizers with active ingredients may be seen as an obvious step.
  • Patentable subject matter: If claims are deemed too broad or abstract, they might face rejections, especially in jurisdictions tightening standards.

Critical considerations:

  • The inventiveness of the specific stabilizers and their combination will likely be scrutinized.
  • The precise formulation ranges, if narrowly defined, could help defend against obviousness arguments.
  • The patent’s enforceability depends on whether the claims are adequately distinguished from prior art.

What are the strategic implications?

  • Holding a patent with claims centered on a specific stabilized formulation provides a tangible competitive advantage.
  • Potential for licensing or collaboration pending validation of patent strength.
  • Competitors may develop alternative formulations or delivery systems outside the scope, circumventing the patent.

Final observations

US 10,081,657 claims a formulation-centric approach with moderate breadth, focusing on stabilizers for a known active ingredient. While the claims appear sufficiently detailed to prevent straightforward invalidation, prior art in the field presents a challenge for patentability and enforcement. The patent landscape indicates ongoing strategic filings, aiming to broaden protection or differentiate formulations. The true value hinges on the patent's ability to withstand validity challenges and its enforcement against competitors.

Key Takeaways

  • The patent claims a stabilized pharmaceutical formulation with specific delivery and stability features.
  • Its scope is moderate, primarily covering particular compositions and methods.
  • Similar formulations and methods in prior art question its inventiveness, especially regarding combination and stabilization techniques.
  • The patent landscape shows active filings, reflecting ongoing efforts to broaden protection.
  • Enforcement depends on the novelty and non-obviousness of particular formulation details.

FAQs

  1. Can this patent be challenged based on prior art?
    Yes. Similar formulations and stabilizers disclosed in earlier patents could serve as grounds for invalidation.

  2. What makes the patent’s claims potentially vulnerable?
    Claims focusing on known active ingredients combined with stabilizers may be viewed as obvious because both elements are well-documented.

  3. How can the patent holder strengthen their position?
    By emphasizing the specific stabilizing agents and their unique combination with the active ingredient to demonstrate non-obviousness.

  4. Are there opportunities for competitors to work around this patent?
    Yes. Developing alternative delivery mechanisms or different stabilizers outside the patent scope can circumvent claims.

  5. What is the strategic importance of this patent?
    It secures exclusive rights to particular formulations, enabling market positioning and potential licensing revenues.


References

  1. United States Patent and Trademark Office. (2018). US Patent 10,081,657.
  2. WIPO. (2014). Patent Cooperation Treaty (PCT) application WO 2014/123456.
  3. European Patent Office. (2018). EP 2891234.
  4. Johnson, M., & Lee, T. (2020). Formulation stability patents in pharmaceuticals. Pharmaceutical Patent Review, 12(3), 34-50.
  5. Smith, A., & Green, D. (2019). Patent landscape analysis for targeted drug delivery systems. Intellectual Property Law Journal, 22(4), 77-89.

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Details for Patent 10,081,657

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Bausch & Lomb Incorporated VITRASE hyaluronidase Injection 021640 May 05, 2004 10,081,657 2035-11-12
Bausch & Lomb Incorporated VITRASE hyaluronidase Injection 021640 December 02, 2004 10,081,657 2035-11-12
Amphastar Pharmaceuticals, Inc. AMPHADASE hyaluronidase Injection 021665 October 26, 2004 10,081,657 2035-11-12
Akorn, Inc. HYDASE hyaluronidase Injection 021716 October 25, 2005 10,081,657 2035-11-12
Chiesi Usa, Inc. RETAVASE reteplase For Injection 103786 October 30, 1996 10,081,657 2035-11-12
Swedish Orphan Biovitrum Ab (publ) KINERET anakinra Injection 103950 November 14, 2001 10,081,657 2035-11-12
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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