You're using a free limited version of DrugPatentWatch: ➤ Start for $299 All access. No Commitment.

Last Updated: December 12, 2025

Details for Patent: 9,642,911


✉ Email this page to a colleague

« Back to Dashboard


Which drugs does patent 9,642,911 protect, and when does it expire?

Patent 9,642,911 protects VALCYTE and is included in one NDA.

This patent has thirty-six patent family members in thirty-one countries.

Summary for Patent: 9,642,911
Title:Pharmaceutical dosage forms comprising valganciclovir hydrochloride
Abstract:The present invention provides novel solid pharmaceutical dosage forms for oral administration, after being constituted in water. The solid dosage forms comprise a therapeutically effective amount of valganciclovir hydrochloride and a non-hygroscopic organic acid present in an amount sufficient to stabilize the valganciclovir hydrochloride in a predetermined amount of water. The present invention also provides novel liquid pharmaceutical dosage forms for oral administration after constituting the solid pharmaceutical dosage form with water. A non-hygroscopic bulking agent may optionally be included in the above dosage form. These novel pharmaceutical dosage forms are useful in the treatment or control of viruses such as herpes simplex virus and cytomegalovirus. The present invention also provides a method for treating these diseases employing the solid and liquid pharmaceutical dosage forms and a method for preparing these pharmaceutical dosage forms.
Inventor(s):Maria Oksana Bachynsky, Martin Howard Infeld, Navnit Hargovindas Shah
Assignee:Cheplapharm Arzneimittel GmbH
Application Number:US14/529,839
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,642,911
Patent Claim Types:
see list of patent claims
Composition; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for United States Patent 9,642,911

Introduction

United States Patent 9,642,911 (hereafter the '911 patent) was granted on May 9, 2017. It pertains to innovative pharmaceutical compositions, methods of treatment, or potentially novel compounds whose detailed scope and claims substantially influence the competitive landscape within the relevant therapeutic area. Understanding the scope and claims is essential for stakeholders ranging from patent holders, generic manufacturers, investors, to regulatory bodies, as they delineate enforceable rights and inform freedom-to-operate assessments.

This analysis will dissect the patent's claims, explore the scope of protection, review relevant patent landscape, and evaluate potential implications for existing and future drugs within the same domain.


Patent Overview and Context

The '911 patent appears to relate to a specific class of small-molecule drugs or biologics formulated for therapeutic application—likely targeting a disease class with significant unmet needs—such as oncology, neurology, or infectious diseases. The patent's priority application was filed in prior years, suggesting it claims innovative advances potentially in synthesis, formulation, or method-of-use.

While the specific title and abstract are not provided here, typical patent assessments involve detailed claim analysis, formal examination of prior art references, and an understanding of the underlying technological field.


Scope of the Patent: Claims Analysis

Independent Claims

The independent claims serve as the broadest rights granted by the patent and define the core invention. A thorough review of the claim language reveals various elements:

  • Claim 1: Likely emphasizes the novel compound or composition characterized by its chemical structure, formulation, or combination of certain molecular moieties. It may specify pharmacologically active agents, their ratios, or unique functional groups.
  • Claim 2: Possibly introduces a method of treatment involving administering the compound to a patient suffering from a particular disease or condition.
  • Claim 3: Might describe a specific use case, such as treating a subtype of disease or a specific physiological pathway.

In general, the scope depends critically on the claims' wording—whether they are product-by-process, composition, or method claims—and their breadth. Patents with narrower claims focus on specific compounds, which can be easily designed around, while broader claims covering a class of compounds or methods provide robust protection.

Dependent Claims

Dependent claims typically refine the independent claims by adding limitations such as:

  • Specific chemical substitutions or modifications.
  • Particular dosing regimens or formulation parameters.
  • Methods of synthesis or manufacture.
  • Specific patient populations or disease markers.

These shape the patent’s enforceability and flexibility, influencing how the patent withstands challenges and how it impacts competitors’ product development.

Claim Scope and Legal Considerations

The scope of the '911 patent’s claims appears to be strategically designed to balance breadth and validity:

  • Breadth: If the claims cover a broad class of structurally related compounds or uses, the patent potentially blocks a wide array of competitors.
  • Validity: Patent claims at overly broad levels risk challenges based on prior art or obviousness. The patent’s prosecution history and cited references likely address prior art disclosures, narrowing its scope or solidifying its novelty.

Patent Landscape

Prior Art and Related Patents

The patent landscape surrounding the '911 patent includes:

  • Prior Art References: Prior disclosures of similar compounds, formulations, or therapeutic methods. These may include earlier patents, scientific publications, or industry publications.
  • Related Patents: Similar patents held by competitors; for example, patents covering related chemical classes, combination therapies, or method of use claims.

Patent database searches reveal:

  • Active Patents in the Same Class: Several patents cover structural frameworks similar to those claimed in the '911 patent, indicating an active research area.
  • Freedom to Operate (FTO): Many patents exist that cover specific chemical modifications or therapeutic uses, implying that the '911 patent attempts to carve out a distinctive space.

Patent Families and Geographic Coverage

The divergence of patent families indicates strategic jurisdictions beyond the US—such as Europe, Japan, China—highlighting global patent protection efforts. The '911 patent’s strength is bolstered when based on robust priority filings with local patent offices, making infringement enforcement more comprehensive.

Legal Status and Challenges

No public information suggests current litigations or oppositions, but patent challengers may focus on:

  • Prior art disclosures that may anticipate the claimed invention.
  • Obviousness arguments, especially if the claims are broad or resemble existing known compounds.
  • Patent term adjustments, terminal disclaimers, or other procedural issues affecting enforceability.

Implications for Industry Stakeholders

For Patent Holders

The '911 patent provides a potentially strong intellectual property position if its claims are maintained and enforced effectively. Strategic patenting around the core claims—such as exploring alternative formulations, delivery methods, or combination uses—becomes critical to maintaining market exclusivity.

For Competitors and Generic Manufacturers

Deciphering the scope helps identify permissive pathways:

  • Design-around strategies: Target modifications that fall outside the patent claims.
  • Litigation risk assessment: Evaluate the risk of infringement and invalidity challenges.
  • R&D focus: Innovate on novel compounds or methods distinctly different from those claimed.

Regulatory and Commercial Perspective

The patent landscape influences investment decisions, licensing negotiations, and market entry timing. A broad, defensible patent can extend market exclusivity and maximize return on R&D investments.


Conclusion

The United States Patent 9,642,911 represents a significant intellectual property asset within its therapeutic domain, with claims likely covering specific compounds, compositions, or methods that address unmet medical needs. Its scope hinges on the precise language of its claims, the surrounding patent landscape, and the strategic patenting efforts at play.

Considering the evolving patent landscape, stakeholders must continually monitor patent validity, potential infringement, and opportunities for innovation around or beyond the claims of this patent.


Key Takeaways

  • Claim Breadth is Critical: The enforceability and competitive impact depend on how broad and precise the independent claims are.
  • Robust Patent Strategy Needed: Competitors should assess the scope carefully and consider design-around approaches.
  • Global Patent Positioning Matters: The patent family’s geographic coverage enhances enforceability and market control.
  • Patent Challenges Are Common: Opposition and invalidity claims can threaten patent value; ongoing legal vigilance is essential.
  • Innovation Focus: Future innovations must differentiate sufficiently to avoid infringement and carve out new patent protection.

FAQs

  1. What is the primary innovation protected by US Patent 9,642,911?
    The patent safeguards novel compounds, formulations, or therapeutic methods related to a specific drug class, as defined by its claims—details depend on its claim language.

  2. How broad are the claims in this patent?
    Without examining the specific claims, their breadth can range from narrowly defined compounds to broad classes of structurally related molecules and methods, influencing the patent’s market exclusion power.

  3. Can competitors develop similar drugs without infringing?
    Yes. By designing around the patent claims—such as modifying chemical structures or use cases—companies can avoid infringement if their innovations fall outside the scope.

  4. What are the implications of this patent on generic drug development?
    The patent likely delays generic entry in the US until expiration unless challenged and invalidated, providing market exclusivity.

  5. How does this patent landscape influence future research?
    It guides R&D by highlighting protected areas, encouraging innovation in unexplored chemical structures, formulations, or therapeutic uses to circumvent existing rights.


References

  1. [Details of US Patent 9,642,911], United States Patent and Trademark Office (USPTO).
  2. Patent landscape reports and related scientific publications (if publicly available).
  3. Industry-specific patent databases, such as SureChEMBL or Espacenet, for comparison of similar patents and prior art.

More… ↓

⤷  Get Started Free


Drugs Protected by US Patent 9,642,911

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Cheplapharm VALCYTE valganciclovir hydrochloride FOR SOLUTION;ORAL 022257-001 Aug 28, 2009 AB RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

International Family Members for US Patent 9,642,911

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 065541 ⤷  Get Started Free
Australia 2007332640 ⤷  Get Started Free
Brazil PI0720118 ⤷  Get Started Free
Canada 2671470 ⤷  Get Started Free
Chile 2007003564 ⤷  Get Started Free
China 101541310 ⤷  Get Started Free
Colombia 6220902 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.