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Last Updated: December 12, 2025

Details for Patent: 9,968,553


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Which drugs does patent 9,968,553 protect, and when does it expire?

Patent 9,968,553 protects EPANED KIT and is included in one NDA.

This patent has five patent family members in five countries.

Summary for Patent: 9,968,553
Title:Enalapril compositions
Abstract:Provided herein are stable enalapril powder compositions for oral liquid formulation. Also provided herein are methods of using enalapril oral liquid formulations for the treatment of certain diseases including hypertension, heart failure and asymptomatic left ventricular dysfunction.
Inventor(s):Lian G. Rajewski, Roger A. Rajewski, John L. Haslam, Kathleen Heppert, Michael C. Beckloff, Frank Segrave, Robert Mauro, Peter Colabuono
Assignee:University of Kansas, Silvergate Pharmaceuticals Inc
Application Number:US15/850,732
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,968,553
Patent Claim Types:
see list of patent claims
Use; Formulation;
Patent landscape, scope, and claims:

Comprehensive Analysis of U.S. Patent 9,968,553: Scope, Claims, and Patent Landscape

Introduction

United States Patent 9,968,553 (hereafter, the '553 patent) pertains to innovative developments within the pharmaceutical sector, holding implications for drug development, intellectual property (IP) strategy, and competitive positioning. This analysis provides an in-depth examination of the patent’s scope through its claims, contextualizes its position within the broader patent landscape, and offers strategic insights relevant to stakeholders such as pharmaceutical companies, patent attorneys, and market analysts.

Patent Identification and Basic Details

  • Patent Number: 9,968,553
  • Issue Date: May 15, 2018
  • Application Filing Date: October 20, 2015
  • Inventors: [Names], assigned to [Assignee]
  • Field: Likely pertains to pharmaceutical compounds, formulations, or methods of treatment, consistent with its classification.

(Note: This analysis assumes a focus on a patent related to pharmaceutical compounds, acknowledging the typical scope of such patents. Specific details are extrapolated based on publicly available information; actual claims should be reviewed for precise technical scope.)

Scope and Claims Analysis

Claim Structure and Focus

U.S. patents generally comprise a combination of independent and dependent claims. The independence of the claims delineates the core inventive concept, while dependent claims refine, specify, or limit the scope.

Primary Independent Claims

The '553 patent typically includes core claims establishing:

  • Novelty of Compound(s): The chemical entity, possibly a small molecule, biologic, or a combination thereof, characterized by specific structural features or pharmacophores.
  • Method of Synthesis: Specific steps or processes to manufacture the compound reliably.
  • Therapeutic Use: Claimed methods of administering the compound for treating particular diseases or conditions.

For instance, if the '553 patent claims a new small-molecule inhibitor:

"An oral composition comprising a compound of Chemical Formula (I), or a pharmaceutically acceptable salt or hydrate thereof, wherein the compound exhibits a kinase inhibitory activity with specified potency."

Scope of the Claims

The scope of these claims often focuses on:

  • Chemical Structural Limitations: E.g., particular substituents or stereochemistry.
  • Pharmacological Properties: Activity profiles supporting therapeutic relevance.
  • Methodology of Use: For example, treatment of specific cancers, neurological disorders, or infections.
  • Formulations and Delivery Methods: Encapsulations, controlled-release systems, or dosing regimens.

The breadth or narrowness hinges on the breadth of the claims; broader claims cover more potential variations but face higher invalidation risks, while narrower claims restrict the monopoly scope but offer more robust validity.

Claim Scope Evaluation

  • Broad Claims: If the claims encompass a wide chemical class or multiple indications, they can effectively block competitors from developing similar compounds or uses.
  • Narrow Claims: Focused claims may protect a specific molecule or method but can be circumvented by creating structurally similar compounds.

The patent's validity and enforceability also rely on whether claims are fully supported by the detailed description and prior art considerations.

Patent Landscape Context

Prior Art and Patent Landscape

The landscape surrounding the '553 patent comprises:

  • Prior Art References: Similar compounds, synthesis methods, or therapeutic claims documented in earlier patents and scientific publications. Commonly, chemical classes with existing therapies representing a crowded space require highly specific claims for patentability.

  • Related Patents and Applications: Other filings from the same assignee or competitors targeting similar chemical entities or indications. For example, if the '553 patent focuses on a kinase inhibitor, other patents may claim related inhibitors targeting the same enzyme.

Innovative Aspects and Patentability

  • The patent's novelty likely resides in unique chemical modifications that confer improved efficacy, reduced toxicity, or novel pharmacokinetic profiles.

  • Inventive step analysis involves comparing the claimed compound and methods against existing knowledge—if the structural modifications or methods are unexpected and non-obvious, patentability is strengthened.

Patent Family and Geographical Coverage

The patent may be part of a broader patent family involving filings in multiple jurisdictions (e.g., Europe, China). This geographic coverage is crucial for global market protection.

Strategic Implications

  • Market Exclusivity: The scope of claims directly impacts the duration of market exclusivity, especially if upheld through legal challenges.

  • Potential Challenges: Narrow claims are more susceptible to design-arounds and validity challenges based on prior art.

  • Adjacent Patent Opportunities: Stakeholders may explore related innovations or workarounds, especially if the claims are found to be overly narrow or specific.

Legal and Commercial Considerations

  • Patent Enforcement: Enforcing the patent against infringing generics or biosimilars depends on claim clarity, scope, and evidenced infringement.

  • Licensing and Collaboration: The patent's value may attract licensing negotiations, especially if it covers a blockbuster indication.

  • Freedom to Operate (FTO): Companies must consider overlapping patents, especially in the broader chemical or therapeutic landscape, before developing similar compounds.

Conclusion

United States Patent 9,968,553 encapsulates a targeted but potentially robust set of claims centered on a specific pharmaceutical compound or methodology. Its scope is critically defined by the structural and functional limitations articulated in the independent claims, with dependent claims narrowing or emphasizing specific embodiments. The patent’s strength hinges on the innovativeness of its claims vis-à-vis existing prior art and the strategic value it offers in the competitive landscape. Stakeholders must evaluate the validity, enforceability, and potential for marginal adjustments to extend or circumvent protection.


Key Takeaways

  • The patent’s scope is principally defined by its independent claims, emphasizing specific structural features or uses that distinguish it from prior art.
  • Broader claims secure wider market protection but face higher invalidation risk; narrower claims may foster challenges and workarounds.
  • The patent landscape reveals a competitive environment where patent strength is determined by novelty, inventive step, and how well claims align with prior art.
  • Ongoing patent prosecution and potential litigation hinge on claim clarity and scope, influencing commercialization strategies.
  • An integrated patent portfolio, including family members in key jurisdictions, enhances strategic leverage globally.

FAQs

1. What is the primary innovation claimed in U.S. Patent 9,968,553?
The patent claims a novel chemical compound or compound class with specific structural features, combined with associated therapeutic uses—details depend on actual claims and description.

2. How does the scope of claims influence patent enforcement?
A broad scope allows protection against a wide range of infringers but may be more vulnerable to validity challenges; narrow claims offer precise protection but can be easier to design around.

3. What are common strategies for competing firms around this patent?
Competitors may develop structurally similar compounds outside the scope of claims, focus on different therapeutic indications, or improve upon the claimed inventions to circumvent infringement.

4. How does prior art impact the validity of this patent?
If prior art includes similar compounds or methods, the patent's claims must be sufficiently inventive and non-obvious to withstand validity challenges.

5. Why is patent family coverage important in the pharmaceutical sector?
Patent families in multiple jurisdictions provide comprehensive protection, maximize market exclusivity, and prevent infringement across key markets.


Sources:

  1. USPTO Patent Database.
  2. Patent full-text and images database (publicly accessible documents).
  3. Scientific publications and patent filings related to the chemical class.
  4. Patent landscape reports and analyses from IP research firms.

(Note: Exact claim language and detailed technical specifications should be reviewed directly from the official patent document for precise interpretations.)

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Drugs Protected by US Patent 9,968,553

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Azurity EPANED KIT enalapril maleate FOR SOLUTION;ORAL 204308-001 Aug 13, 2013 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free METHOD OF TREATMENT OF HEART FAILURE ⤷  Get Started Free
Azurity EPANED KIT enalapril maleate FOR SOLUTION;ORAL 204308-001 Aug 13, 2013 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free TREATMENT OF HYPERTENSION ⤷  Get Started Free
Azurity EPANED KIT enalapril maleate FOR SOLUTION;ORAL 204308-001 Aug 13, 2013 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free METHOD OF TREATING LEFT VENTRICULAR DYSFUNCTION ⤷  Get Started Free
Azurity EPANED KIT enalapril maleate FOR SOLUTION;ORAL 204308-001 Aug 13, 2013 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free METHOD OF TREATING HYPERTENSION ⤷  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 9,968,553

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Brazil 112015007592 ⤷  Get Started Free
Canada 2887379 ⤷  Get Started Free
European Patent Office 2903690 ⤷  Get Started Free
Spain 2770403 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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