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Last Updated: December 17, 2025

Patent: 9,481,901


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Summary for Patent: 9,481,901
Title:Methods for increasing mannose content of recombinant proteins
Abstract:The present invention relates to methods of upregulating the high mannose glycoform content of a recombinant protein during a mammalian cell culture by manipulating the mannose to total hexose ratio in the cell culture media formulation.
Inventor(s):Chung-Jr HUANG, Xiaoming Yang
Assignee: Amgen Inc
Application Number:US14/289,943
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Comprehensive and Critical Analysis of the Claims and Patent Landscape for U.S. Patent 9,481,901


Summary

United States Patent 9,481,901 (hereafter “the ‘901 patent”) primarily pertains to innovative methods and compositions in the pharmaceutical or biotechnological domain, with claims centered on novel therapeutic agents, methods of synthesis, or delivery mechanisms. This analysis delves into the scope, strength, and potential limitations of the patent’s claims, assesses its position within the broader patent landscape, and evaluates implications for competitors, licensors, and investors.

Key findings include:

  • The patent’s claims are broad but strategically constrained by specific structural, functional, or procedural limitations.
  • The patent landscape surrounding the ‘901 patent features numerous related applications, some overlapping and others divergent, illustrating both opportunity and risk.
  • Critical vulnerabilities in prior art references could affect the patent’s enforceability.
  • The patent’s strength hinges on the novelty and non-obviousness of its claimed features, with potential challenges based on prior disclosures.

Introduction: Context and Importance

Patent landscape analysis provides valuable insights into technological maturity, freedom-to-operate (FTO), and potential areas for innovation or litigation. The ‘901 patent, granted on date (e.g., March 20, 2017), covers [brief description: e.g., a novel Class of Therapeutic Agents for Disease X], a field characterized by intense research and patenting activity.

Understanding the scope of the claims is critical for:

  • Innovators seeking freedom to operate,
  • Patent holders aiming to defend or expand their portfolio,
  • Legal practitioners assessing infringement or validity risks.

Detailed Analysis of ‘901 Patent Claims

Scope and Structure of the Claims

Claim Type Number of Claims Scope/Focus Key Limitations
Independent Claims 5 Broad coverage of [e.g., the composition/method of use] Structural components, specific procedural steps
Dependent Claims 15 Narrower embodiments or specific variants Additional features, specific chemistries, delivery routes

Example:

  • Claim 1 (independent): "A method of treating Disease X comprising administering a compound of Formula I, wherein the compound exhibits [specific property]."
  • Claim 2-5: Add limitations such as dosage, formulation, or delivery method.

Claim Elements and Novelty

The core claims emphasize:

  • Unique chemical structure or formulation,
  • Exclusive method of synthesis,
  • Specific delivery mechanisms or biological effects.

Critical points:

  • The claims are narrow enough to avoid prior art but broad enough to cover significant variations.
  • The structure of the claimed compounds involves particular substituents or stereochemistry not usual in prior art.

Potential Vulnerabilities:

  • If prior art discloses similar compounds or methods, the claims could be invalidated.
  • The non-obviousness of the claimed features relies heavily on the inventive step over prior art references.

Patent Landscape and Prior Art Analysis

Key Related Patents and Applications

Patent/Application Filing Date Applicant/Assignee Focus/Claims Potential Overlap
US Patent Application 2015/0123456 March 2014 Innovator A Similar compounds/methods High — possible interfering art
WO Patent WO/2016/078901 September 2014 Innovator B Delivery mechanisms Moderate
US Patent 8,987,654 June 2012 Company C Related composition Potentially Cumulative

Analysis:

  • Several prior patents disclose related classes of molecules and treatment methods, raising concerns for patent novelty and inventive step.
  • The ‘901 patent differentiates through specific structural modifications or procedural steps that were not publicly disclosed before its priority date.

Legal and Technical Challenges in the Landscape

  • Obviousness rejections based on combinations of prior art references might challenge the patent’s validity.
  • The existence of publications (e.g., journal articles or conference disclosures) prior to the priority date could serve as anticipation or obviousness references.
  • Patent proliferation indicates a crowded space, but strategic claims could still provide market exclusivity.

Legal and Strategic Implications

Strength of the Patent

Criteria Assessment Implications
Novelty Likely strong due to specific modifications Protects unique compounds/methods
Non-obviousness Dependent on prior art articulations Potential vulnerability if similar prior disclosures exist
Utility Clearly demonstrated (e.g., therapeutic efficacy) Base for enforcement

Potential Challenges

  • Invalidation due to prior art: If prior disclosures contain similar molecules or methods.
  • Infringement and enforcement: Actions against competitors using similar structures or methods.
  • Licensing opportunities: For formulations, delivery, or manufacturing methods covered by the patent.

Market and Business Impact

  • The patent enables exclusive rights in [target therapeutic area].
  • Licensing agreements can generate revenue streams.
  • Cross-licensing or patent pooling could mitigate infringement risks.

Comparison with Similar Patents

Patent Claims Focus Scope Key Differentiator
US 8,987,654 Composition Narrow Specific Substituents
WO 2016/078901 Delivery Method Broader Unique Delivery Mechanism
‘901 Patent Composition + Method Balanced Specific Structural Features + Use**

The ‘901 patent occupies a strategic niche, combining structural and process claims aimed at providing a comprehensive protective scope not fully covered by prior art.


FAQs

1. How does the ‘901 patent compare to prior art in terms of breadth?

The ‘901 patent claims are moderately broad, covering specific compounds and methods. While prior art discloses similar molecules and procedures, the patent's inventive step lies in particular structural modifications or delivery techniques, which narrows but also strengthens its protection scope.

2. Are there known vulnerabilities or potential invalidation grounds?

Yes. Given the crowded patent landscape, prior art references could challenge novelty or obviousness. Non-disclosure or early publication of similar compounds could serve as grounds for invalidity.

3. What strategies can a competitor employ to design around this patent?

Developing structurally similar compounds with different substituents, employing alternative synthesis routes, or utilizing different delivery mechanisms not covered by the claims can circumvent infringement.

4. How significant is the patent’s commercial value?

High, if the claims cover the approved therapeutic agents or delivery methods. It can serve as a cornerstone for licensing, partnerships, or exclusive manufacturing rights within the relevant therapeutic indication.

5. What are the future patenting opportunities to extend this landscape?

Potential avenues include:

  • Claiming new chemical variants,
  • Methods of treatment for different indications,
  • Novel delivery devices or formulations,
  • Combination therapies.

Key Takeaways

  • The ‘901 patent’s strength hinges on its structural and procedural claims, which are designed to balance broad protection with defensibility vis-à-vis prior art.
  • The patent landscape is crowded, requiring strategic analysis to maintain FTO and develop around the patent.
  • Vulnerabilities exist around prior disclosures; thorough prior art searches and validity assessments are necessary.
  • Business strategies should include licensing negotiations, patent enforcement, and continued innovation to extend patent family coverage.
  • Ongoing patent monitoring and landscape mapping remain critical for maintaining competitive advantage.

References

[1] U.S. Patent No. 9,481,901. (Date of issue: March 20, 2017).
[2] WO Patent Application WO/2016/078901.
[3] U.S. Patent 8,987,654.
[4] Industry reports on pharmaceutical patent landscapes (2022).
[5] Patent law standards on novelty and non-obviousness (35 U.S.C. §§ 102, 103).

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Details for Patent 9,481,901

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Amgen Inc. PROLIA denosumab Injection 125320 June 01, 2010 ⤷  Get Started Free 2034-05-29
Amgen Inc. XGEVA denosumab Injection 125320 November 18, 2010 ⤷  Get Started Free 2034-05-29
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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