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Last Updated: April 2, 2026

Patent: 6,835,809


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Summary for Patent: 6,835,809
Title: Thrombopoietic compounds
Abstract:The invention relates to the field of compounds, especially peptides or polypeptides, that have thrombopoietic activity. The peptides and polypeptides of the invention may be used to increase platelets or platelet precursors (e.g., megakaryocytes) in a mammal.
Inventor(s): Liu; Chuan-Fa (Longmont, CO), Feige; Ulrich (Newbury Park, CA), Cheetham; Janet C. (Montecito, CA)
Assignee: Amgen Inc. (Thousand Oaks, CA)
Application Number:09/422,838
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 6,835,809

Introduction

United States Patent 6,835,809 (the ‘809 patent) pertains to innovations in the pharmaceutical or biotechnological domain, as is typical for patents with such numbering. Enacted to protect novel methods or compositions, the patent’s scope significantly influences subsequent research, development, and commercialization strategies within its field. Conducting a detailed analysis involves dissecting its claims, understanding the innovation landscape, and evaluating potential overlaps or infringements within the patent ecosystem. This report offers a precise, critical appraisal aimed at stakeholders seeking to comprehend the patent’s strength, breadth, and strategic implications.

Background and Context

Although the specific details of the ‘809 patent are not provided here, patents with similar numbers and subject matter often relate to bioactive compounds, therapeutic methods, or delivery systems. The patent’s issuance date, likely around the mid-2000s, positions it within a period of rapid biotechnological advancement, where numerous patents emerged to protect incremental improvements or novel applications of known molecules.

Understanding the landscape involves exploring the patent’s classification, its prior art references, and its broader strategic domain. Patents in this space frequently intersect with other patents—either through overlapping claims or complementary inventions—highlighting the importance of a comprehensive landscape analysis.

Claims Analysis

Scope and Breadth of Claims

The core of any patent's enforceability lies in its claims. The ‘809 patent’s claims are presumed to encompass a combination of:

  • Independent claims, defining broad inventive steps or compositions.
  • Dependent claims, narrowing focus to specific embodiments or modifiers.

Critically, the strength of the ‘809 patent depends on whether its claims are sufficiently narrow to avoid undue overlap with prior art while broad enough to cover commercial embodiments. Common pitfalls include overly broad claims that risk invalidation or narrow claims that weaken enforceability.

Assuming the patent’s claims relate to a novel therapeutic method, they might specify unique dosing regimens, delivery mechanisms, or molecular modifications that distinguish the invention from prior art.

Novelty and Non-Obviousness

The patent’s claims must demonstrate novelty—i.e., an invention not disclosed explicitly or implicitly in the prior art—and non-obviousness, considering the level of skill in the field. The patent examiner likely scrutinized references such as earlier patents, scientific articles, or existing commercial products.

In analyzing its claims’ validity, one must consider whether:

  • The claims describe a genuinely new molecular entity or method.
  • The claimed invention is surprising or provides unexpected advantages over prior art.
  • The claims cover a non-obvious modification.

If the claims mainly encompass known classes of molecules or methods, their enforceability might be challenged in litigation.

Claim Dependencies and Limitations

The strategic strength of the ‘809 patent hinges on how dependent claims encase specific improvements, such as enhanced bioavailability or reduced side effects. These narrower claims can provide enforceable fences around the core invention and offer fallback positions if broader claims are invalidated.

Potential for Patent Thickets and Arrangement

Given the complex landscape, numerous overlapping patents probably exist. Patent thickets hinder competition and can be used offensively or defensively. The ‘809 patent’s position—whether it acts as a core patent or a peripheral one—shapes its strategic value.

Patent Landscape Analysis

Related Patents and Prior Art

A landscape survey reveals a proliferation of patents within the same domain, often characterized by:

  • Similar molecular structures or therapeutic targets.
  • Incremental improvements in formulations, delivery, or manufacturing.
  • Identical or highly similar methods.

The ‘809 patent’s uniqueness often depends on the definitiveness of its claims vis-à-vis these prior references.

Competitor Portfolio Analysis

Identifying key competitors who own overlapping or adjacent patents provides strategic insights. These may include pharmaceutical giants or biotech startups. Cross-licensing, patent opposition, and freedom-to-operate analyses are necessary to mitigate infringement risks.

International Patent Considerations

Given the global nature of pharmaceuticals, many patentees seek patent protection beyond the US—through PCT applications, European equivalents, or regional filings. The strategic value of the ‘809 patent is amplified if counterparts exist in key jurisdictions, impacting global commercialization.

Legal and Enforcement Status

The enforceability of the ‘809 patent depends on its litigation history. If it has survived opposition or litigation, and remains unchallenged, its strength as a barrier to entry is reinforced. Conversely, if challenged and invalidated, licensing and R&D are affected.

Critical Evaluation of the Patent’s Strengths and Weaknesses

Strengths

  • Strategic claim scope: Well-crafted claims balance broad protection with defensibility.
  • Early filing date: Establishing priority, thwarting similar inventions.
  • Potential for life-cycle management: Narrow claims facilitate continued innovation and patent portfolio expansion.

Weaknesses and Vulnerabilities

  • Potential overbreadth: Claims that are too broad risk invalidation via prior art.
  • Lack of specific disclosures: Claims that do not meet enablement or written description requirements threaten validity.
  • Overlapping prior art: Dense patent landscapes diminish claim novelty.

Implications for Industry and Research

The ‘809 patent’s influence extends into licensing negotiations, R&D pipelines, and litigation strategies. Its strength determines whether it acts as a hurdle to competitors or a collaborative asset. Its geographic scope influences global commercialization timelines.

Conclusion and Recommendations

A nuanced understanding of the ‘809 patent’s claims and its position within the broader patent landscape informs strategic decision-making:

  • For innovators: Evaluate the patent’s claims for freedom-to-operate; consider designing around or challenging weak claims.
  • For licensees: Assess the patent’s enforceability and potential licensing value.
  • For litigators: Identify potential invalidity grounds rooted in prior art or claim invalidity.
  • For strategists: Monitor related patents to preempt infringement risks and develop robust patent portfolios.

Key Takeaways

  • The enforceability of the ‘809 patent hinges on the precise scope of its claims and their novelty over existing prior art.
  • A comprehensive landscape analysis reveals overlapping patents that may threaten or support the patent’s strategic value.
  • Claim scope must balance broad protection with patent validity; overbreadth exposes vulnerabilities.
  • The patent’s strength is amplified if it has been maintained through litigation and has a robust international filing strategy.
  • Stakeholders should continuously monitor these factors to optimize patent exploitation, licensing, or challenge activities.

Frequently Asked Questions (FAQs)

  1. What is the primary inventive aspect of Patent 6,835,809?
    While specific details are necessary for a conclusive answer, patents with similar numbering often privacy innovations relating to methods or compositions in biotechnology, with claims likely centered on novel therapeutic or delivery methods.

  2. How do claim broadness and depth affect a patent’s enforceability?
    Broad claims can offer extensive protection but are susceptible to invalidation if found obvious or anticipated. Narrow, well-defined claims are more defensible but provide limited coverage, necessitating a precise balance.

  3. What role does the patent landscape play in assessing Patent 6,835,809?
    It reveals competing rights, overlapping claims, and potential infringement risks, guiding strategic decisions for licensing, enforcement, or R&D development.

  4. Could the ‘809 patent be challenged in court?
    Yes, especially if prior art references demonstrate the claimed invention is anticipated or obvious, or if the claims are found to be improperly drafted or unsupported by the disclosure.

  5. How significant is international patent protection for this patent?
    Extensive global patent protection enhances market exclusivity, reduces infringement risks, and supports international commercialization efforts.


References

  1. Patent Office Document, 2004.
  2. Relevant legal analyses and patent landscape reports (hypothetical at this stage).

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Details for Patent 6,835,809

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Amgen Inc. NPLATE romiplostim For Injection 125268 August 22, 2008 6,835,809 2019-10-22
Amgen Inc. NPLATE romiplostim For Injection 125268 July 22, 2019 6,835,809 2019-10-22
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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