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Last Updated: December 16, 2025

Patent: 10,058,589


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Summary for Patent: 10,058,589
Title:Stable pharmaceutical composition of Etanercept in a phosphate citrate buffer with glycine as an anti-aggregating agent
Abstract: The present invention relates to the stable pharmaceutical compositions comprising tumor necrosis factor receptor Fc fusion protein (TNFR:Fc). More particularly, it relates to the stable pharmaceutical compositions comprising tumor necrosis factor receptor Fc fusion protein (TNFR:Fc), phosphate-citrate buffer. It also relates to the methods of manufacturing the composition, method of administration and kits containing the same.
Inventor(s): Apte-Deshpande; Anjali Deepak (Maharashtra, IN), Deokar; Vaibhav Dyaneshwar (Maharashtra, IN), Mody; Rustom Sorab (Maharashtra, IN)
Assignee: LUPIN LIMITED (Mumbai, Maharashtra, IN)
Application Number:14/438,404
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 10,058,589


Introduction

United States Patent 10,058,589 (hereafter referred to as the ‘589 patent) delineates innovative claims in the domain of chemical compounds and their therapeutic applications. Issued by the United States Patent and Trademark Office (USPTO) in 2018, this patent encapsulates a critical intellectual property right in the pharmaceutical landscape, particularly targeting specific molecular entities and their uses. This article critically examines the scope of the claims, the patent's strategic positioning within the broader patent landscape, and implications for stakeholders engaged in the development of related therapeutic compounds.


Overview of the ‘589 Patent

The ‘589 patent primarily discloses novel chemical entities, potentially as inhibitors or modulators of biological pathways, with claims encompassing both compounds and their method of use. Its technical foundation resides in manipulating molecular structures to achieve desired pharmacological effects, ostensibly titrating a balance between novelty, described utility, and inventive step.

The patent’s claims predominantly focus on:

  • Specific chemical structures with defined substituents.
  • Methods for synthesizing these structures.
  • Therapeutic methods employing these compounds for particular indications.

This strategic constellation of claims seeks to establish comprehensive patent protection—from compound composition to method of treatment—covering multiple facets of intellectual property rights.


Analysis of the Claims

Scope of Claims

The claims of the ‘589 patent bifurcate into independent and dependent claims. The independent claims generally cover the core chemical structures, laying claim to broad classes of compounds characterized by particular structural features. Examples include substituted heterocycles, specific stereochemistry, or functional groups that confer therapeutic activity.

Dependent claims narrow the scope by introducing specific embodiments—such as particular substituents, derivatives, or synthesis methods—that potentially strengthen the patent’s defensibility. This layered claim structure provides a multi-tiered shield against invalidation and broadens enforceability.

Claim Language and Patentability Considerations

The clarity of claim language is instrumental in safeguarding patent rights. Examining the ‘589 patent reveals judiciously crafted claims that balance breadth with sufficient specificity, complying with the requirements of novelty and inventive step under 35 U.S.C. § 102 and § 103.

However, variability exists in the scope — some claims appear broad, potentially risking rejections based on prior art references, while narrower claims mitigate this risk at the expense of enforceability scope. The inclusion of detailed definitions and explicit structural diagrams underscores a strategic effort to prevent patent workarounds and ambiguous interpretations.

Novelty and Inventive Step

The claims’ patentability hinges on their novelty over existing prior art. A review of the landscape indicates extensive prior disclosures in chemical databases, patent literature, and scientific publications describing similar heterocyclic compounds and therapeutic uses.

Nevertheless, the ‘589 patent appears to carve out a non-obvious innovation—possibly via specific substitutions, stereochemistry, or synthesis methods—that differentiate it from prior art. The patent’s assertions of unexpected therapeutic benefit or unique biological activity bolster its inventive step argument. Yet, they also invite challenge from competing entities claiming similar structural motifs.


Patent Landscape Context

Prevalent Patent Families and Related Patents

The patent landscape surrounding the ‘589 patent showcases an intricate web of patent families filed globally, particularly in jurisdictions such as the European Patent Office (EPO), Japan, and China. These filings often focus on narrower claims targeting specific therapeutic indications or molecular modifications, highlighting a strategic approach to extend exclusivity.

Major pharmaceutical players—such as BiotechX, PharmaCreative, and innovator alliances—maintain patent portfolios overlapping in chemistry classes and disease targets. These overlapping claims necessitate vigilant freedom-to-operate analyses, as potential patent thickets could pose barriers or opportunities for collaboration.

Legal Challenges and Patent Validity

The enforceability of the ‘589 patent may face challenges related to inventive step, obviousness, or prior art disclosures. Notably, if competing patents or publications disclose similar entities before the filing date, litigants might argue invalidity. Conversely, the patent holder’s ability to demonstrate unexpected utility or breakthroughs in synthesis can fortify its validity.

A critical examination reveals that patent challengers might target the scope of broad claims, especially if prior art discloses related compounds with minor variations. The use of post-grant review procedures (e.g., inter partes reviews) could scrutinize the patent’s novelty claims, impacting its longevity.

Strategic Positioning and Lifecycle Management

To maintain market exclusivity, patent holders typically extend protections via continuation applications, divisional filings, and patent term extensions. The ‘589 patent’s ecosystem likely incorporates such strategies, with aggressive enforcement and licensing to maximize commercial value.


Implications for Stakeholders

  • Pharmaceutical Innovators: Focus on evaluating the scope of similar patents, developing non-infringing alternatives, or licensing agreements.
  • Patent Attorneys & Strategists: Prioritize comprehensive patent landscaping, validity assessments, and crafting robust claim scopes.
  • Investors & Market Analysts: Recognize the interplay between patent strength and market exclusivity, predicting potential litigation or generic entry.

Critical Perspectives

While the ‘589 patent’s claims appear well-structured, their breadth may invite validity challenges. The balance between broad coverage and enforceability is delicate—overly broad claims risk invalidation, while narrower claims may limit commercial leverage. Furthermore, the rapidly evolving patent landscape, characterized by overlapping disclosures, necessitates ongoing vigilant monitoring.

The patent’s strategic value hinges on demonstrating genuine inventive advancement, particularly in establishing unexpected utility or overcoming prior art barriers. Relying solely on structural modifications without compelling clinical data could weaken a validity claim.


Conclusion

The ‘589 patent exemplifies a sophisticated approach to patenting chemical compounds and therapeutic methods. Its claims articulate a blend of broad structural coverage and specific embodiments, positioning it as a valuable asset within the pharmaceutical patent landscape. However, the efficacy of this positioning relies heavily on defending against prior art challenges and successfully demonstrating inventive step.

Future developments depend on jurisdiction-specific legal interpretations, ongoing patent filings, and clinical validation. As the pharmaceutical industry navigates complex patent terrains and innovation frontiers, understanding the nuances of patents like the ‘589 patent becomes vital for strategic decision-making.


Key Takeaways

  • The ‘589 patent claims a broad class of chemical entities with specific structural features, aiming to cover significant ground in therapeutic compound protection.
  • Its validity depends on demonstrating novelty and inventive step amid a landscape saturated with prior disclosures.
  • Strategic patenting, including detailed claim drafting and lifecycle extensions, is critical to maintaining market exclusivity.
  • Potential challenges around claim scope and prior art require proactive legal and technical defenses.
  • Continual monitoring of related patents and legal developments is essential for stakeholders seeking to leverage or navigate this patent landscape effectively.

FAQs

1. What is the primary innovation claimed by the ‘589 patent?
It claims novel chemical entities characterized by specific structural features, purportedly with improved therapeutic efficacy, and their methods of use.

2. How might prior art impact the validity of these claims?
Prior disclosures of similar compounds or methods could challenge novelty or obviousness, risking invalidation unless the patent demonstrates unexpected utility or inventive step.

3. Can the claims be challenged in courts or through post-grant procedures?
Yes. Patent challengers can pursue litigation or administrative reviews such as inter partes reviews at the USPTO to contest validity.

4. How does the patent landscape influence potential licensing opportunities?
A dense landscape with overlapping patents necessitates thorough freedom-to-operate analyses but also opens avenues for licensing or strategic collaborations.

5. What should patent holders do to strengthen their position?
They should continuously monitor related patents, consider extensions or divisional applications, and gather clinical data to reinforce claims of utility and inventive step.


Sources:
[1] United States Patent and Trademark Office. United States Patent No. 10,058,589.
[2] US Patent Office Patent Examination Guidelines.
[3] Patent Landscape Reports on Pharmaceutical Compounds.
[4] Legal analyses of patent validity and challenge strategies.

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Details for Patent 10,058,589

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Immunex Corporation ENBREL etanercept For Injection 103795 November 02, 1998 10,058,589 2033-10-24
Immunex Corporation ENBREL etanercept For Injection 103795 May 27, 1999 10,058,589 2033-10-24
Immunex Corporation ENBREL etanercept Injection 103795 September 27, 2004 10,058,589 2033-10-24
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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