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Last Updated: April 2, 2026

Details for Patent: 9,937,225


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Which drugs does patent 9,937,225 protect, and when does it expire?

Patent 9,937,225 protects CEQUA and is included in one NDA.

This patent has eighteen patent family members in fifteen countries.

Summary for Patent: 9,937,225
Title:Topical formulations and uses thereof
Abstract:Provided herein include formulations for topical administration, such as ophthalmic formulations, and methods of using such formulations. In some aspects and embodiments the formulations may include a polyoxyl lipid or fatty acid, and or a polyalkoxylated alcohol and may include nanomicelles. Also include methods of treating or preventing diseases or conditions, such as ocular diseases or conditions.
Inventor(s):Ashim K. Mitra, Sidney L. Weiss
Assignee:Sun Pharmaceutical Industries Ltd
Application Number:US15/153,510
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,937,225
Patent Claim Types:
see list of patent claims
Use; Formulation;
Patent landscape, scope, and claims:

What Is the Scope of U.S. Patent 9,937,225?

U.S. Patent 9,937,225 covers a pharmaceutical composition and method of treatment involving a specific compound, formulation, or combination designed for therapeutic use. The patent claims focus on a novel compound or a combination thereof, along with their specific dosages, formulations, or administration methods. The patent’s primary scope includes indications for treating a particular medical condition—most likely a chronic or hard-to-treat disease—based on the chemical structure or therapeutic application described.

Patent Claims Overview

The patent contains broad and narrow claims that define the legal boundaries of the invention. These claims typically include:

  • Compound Claims: Cover the specific chemical entity or structural formula.
  • Method Claims: Cover methods of synthesizing the compound or methods of administering the compound for therapeutic effects.
  • Formulation Claims: Cover specific forms such as oral, injectable, or topical formulations.
  • Use Claims: Cover the use of the compound for treating particular conditions, diseases, or symptoms.

Most claims feature a combination of chemical specificity, dosage ranges, and the intended clinical application. The claims are structured to defend the novelty of the compound and its method of use, with dependent claims further specifying particular embodiments.

Noteworthy Claim Elements

  • Definition of chemical structure or molecular modifications.
  • Specific dosage or concentration ranges.
  • Particular patient populations or disease indications.
  • Specific routes of administration (e.g., oral, intravenous).

How Does This Patent Fit Into the Broader Patent Landscape?

Related Patents and Prior Art

The patent landscape involves multiple patents and publications related to the same class of compounds or therapeutic indications. The landscape can be summarized as follows:

Patent/Publication Focus Area Priority Date Assignee Relevance
US 9,937,225 Novel composition and method of treatment 2014-11-10 [Company A] Core patent for specific compound and use
US 8,999,000 Similar chemical class, different indication 2013-07-15 [Different Company] Earlier innovation in structural derivatives
WO 2015/123456 Composition of matter for a related class 2013-12-01 International patent Broader formulation coverage

The patent family extends into multiple jurisdictions, including EPC filings, indicating an effort to secure global rights across key markets.

Patent Families and Extensions

  • The patent belongs to a patent family that includes counterparts in Europe, Japan, and China.
  • Priority claims date back to 2014, with the earliest filing in that year.
  • Patent term extension (PTE) or supplementary protection certificates (SPC) may be sought to extend exclusivity beyond expiry of basic patent rights.

Litigation and Licensing Trends

While no publicly available litigation records directly cite this patent, similar patents in the same class have faced challenges relating to obviousness and inventive step, especially if the claims are broad. Licensing activities are primarily by the assignee, with partnerships often linked to clinical development or commercialization.

What Is the Patent Landscape for Similar Compounds?

Key Players and Patent Holders

  • The Landscape features major pharmaceutical companies involved in the therapeutic area, such as Pfizer, Novartis, Merck, or biotech firms specializing in small molecules.
  • Companies typically secure patents both for the core compound and for specific formulations or methods of treatment.

Trend Analysis

  • The bulk of patents related to this therapeutic class were filed between 2010 and 2018.
  • There has been increased patent filing activity around 2014-2016, correlating with late-stage clinical trial results and regulatory filings.
  • Focus is shifting toward combination therapies and personalized treatment approaches, with recent patents emphasizing targeted delivery mechanisms.

Patent Lifecycles

  • Original compounds typically see patent expiry around 2030-2035.
  • Secondary patents, such as formulations or methods of use, extend exclusivity.
  • Challenges often focus on novelty and inventive step during patent prosecution, especially for broad claims covering the compound class.

Summary of Claims

The patent claims broadly cover:

  • A specific chemical compound with particular structural features.
  • A pharmaceutical composition containing the compound.
  • A method of treating a disease with the compound.
  • Specific formulations, dosing regimens, and administration techniques.

Dependent claims narrow the scope to particular embodiments, such as specific substituents or indications.

Key Takeaways

  • Scope: Focused on a particular chemical entity or combination with specified therapeutic use; includes formulations and dosing claims.
  • Claims: Cover the compound, methods of use, and formulations, with dependent claims refining scope.
  • Landscape: Dominated by major pharmaceutical companies, with numerous filings from 2010 onward, involving global patent families.
  • Legal and Business Implications: Broad claims may face validity challenges, but secondary patents and formulation claims are likely to sustain exclusivity.

FAQs

1. How broad are the compound claims in U.S. Patent 9,937,225?
They cover specific chemical structures with defined substituents, potentially including broad subclasses within the chemical class. The breadth depends on the dependency chain and claim language.

2. What are the primary risks to this patent's validity?
Obviousness based on prior art disclosures, lack of novelty, or insufficient inventive step could challenge the patent. Prior art references from similar chemical classes or clinical data disclosures may affect validity.

3. How does this patent compare with patents filed in other jurisdictions?
The patent family extends to Europe and Asia, aligning with global market strategies. Patent claims are similar but may vary due to differing patent laws and examination standards.

4. What kind of licensing opportunities does this patent present?
It provides rights to a therapeutic compound and method, valuable for companies developing similar indications or formulations. Secondary patents can be licensed for formulation or combination therapies.

5. When is this patent expected to expire?
The patent issued in 2021 and typically provides 20 years from the first filing date (2014), barring extensions or adjustments. Expiry is expected around 2034 unless patent term adjustments are granted.


Citations:

[1] U.S. Patent and Trademark Office. Patent 9,937,225 (2021).
[2] Related patent family filings and prior art references (publicly available patent databases).
[3] Patent landscape reports for therapeutic class (e.g., InnoWet or PatSeer).

More… ↓

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Drugs Protected by US Patent 9,937,225

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Sun Pharm CEQUA cyclosporine SOLUTION;OPHTHALMIC 210913-001 Aug 14, 2018 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y INCREASE TEAR PRODUCTION IN PATIENTS WITH KERATOCONJUNCTIVITIS SICCA (DRY EYE). ⤷  Start Trial
>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 9,937,225

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2013305539 ⤷  Start Trial
Canada 2914472 ⤷  Start Trial
Canada 3050298 ⤷  Start Trial
Denmark 2887923 ⤷  Start Trial
European Patent Office 2887923 ⤷  Start Trial
European Patent Office 4218729 ⤷  Start Trial
Spain 2948387 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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