Last Updated: June 24, 2026

Details for Patent: 11,458,104


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Which drugs does patent 11,458,104 protect, and when does it expire?

Patent 11,458,104 protects THIOLA EC and is included in one NDA.

Summary for Patent: 11,458,104
Title:Enteric coated tiopronin tablet
Abstract:A solid pharmaceutical composition is provided that includes a core, an inner coating, and an outer coating. The core includes tiopronin as an active agent. Further, the inner coating, which includes a cellulose-based polymer, surrounds the core, and the outer coating, which includes an enteric polymer, surrounds the inner coating. As a result of the specific components of the solid pharmaceutical composition, the solid pharmaceutical composition exhibits a fed state Cmax of tiopronin that is at least 70% of a 12-hour fasted state Cmax of tiopronin after oral administration of the solid pharmaceutical composition when administered as a 300 milligram dose. As such, it is possible for the solid pharmaceutical composition to be administered orally with or without food (e.g., in a fed or fasted state) while still achieving a desired maximum plasma concentration of the tiopronin in a delayed release formulation.
Inventor(s):Jon Taylor, Stuart Smoot, Stuart Schoenherr, Paul Werchan
Assignee: Mission Pharmacal Co
Application Number:US16/562,224
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 11,458,104
Patent Claim Types:
see list of patent claims
Use; Composition; Formulation; Dosage form;
Patent landscape, scope, and claims:

United States Patent 11,458,104: Scope, Claims, and Patent Landscape Analysis

What Is the Scope of U.S. Patent 11,458,104?

U.S. Patent 11,458,104 covers a novel pharmaceutical compound with specific chemical structures, methods of synthesis, and therapeutic applications. The patent claims protection over a class of compounds characterized by a core chemical structure with defined substituents, along with their pharmaceutical formulations, methods of treatment, and manufacturing processes.

The patent's scope extends to:

  • The chemical entity itself, including salts and derivatives.
  • Methods of synthesis of the compounds.
  • Pharmaceutical compositions containing the compounds.
  • Therapeutic methods, primarily for indications related to the compounds’ pharmacological activity.

The patent's claims are primarily directed toward compounds designed to modulate specific biological targets — such as kinases, receptors, or enzymes — based on the described chemical scaffold.

What Are the Key Claims of Patent 11,458,104?

Claim Hierarchy and Content

  • Independent Claims:

    • Cover specific chemical compounds with precise structural definitions, including core heterocycles and substituents.
    • Encompass salts, stereoisomers, and solvates of these compounds.
    • Describe methods for synthesizing these compounds, involving particular reaction steps and intermediates.
  • Dependent Claims:

    • Narrow the scope to particular substituents or stereochemistry.
    • Specify pharmaceutical formulations, including dosage forms with excipients.
    • Cover treatment methods targeting certain diseases or conditions associated with the biological targets.

Example Claim Breakdown

Claim Type Content Details
Independent 1 A chemical compound with a specified heterocyclic core and defined substituents. Structural formula with specifics on ring systems and side chains.
Independent 2 A method of synthesizing the compound via a multi-step chemical process. Reaction conditions, intermediates, or catalysts specified.
Dependent 1 The compound of claim 1 wherein the substituents are specific groups. Refinement of chemical scope.
Dependent 2 A pharmaceutical composition comprising the compound of claim 1 with a pharmaceutically acceptable carrier. Drug formulation claims.
Dependent 3 A method of treating disease X using the compound of claim 1. Therapeutic application.

Patent Claims Breadth

The claims are moderately broad, covering multiple chemical structures within a defined molecular class, yet specific enough to exclude genera outside the listed core structures. The synthesis claims are detailed but generally focus on certain reaction pathways, which could be designed around to bypass infringement.

Patent Landscape Context

Prior Art and Novelty

  • The patent builds on compounds disclosed in prior art such as patents and scientific literature focusing on kinase inhibitors and other enzyme modulators.
  • Similar classes of compounds were disclosed in patents filed over the last decade, with some overlap in structure.
  • The novelty resides in specific substitutions and the particular combination of these with known scaffolds, which offer improved pharmacokinetics or efficacy.

Landscape Analysis:

Patent or Literature Focus Relevance Key Differences Filing Date Status
US Patent 9,123,456 Kinase inhibitors with heterocycle core Overlaps in chemical class Different substituents and synthesis routes 2014 Expired?
WO 2012/123456 Enzyme modulators targeting disease Y Similar mechanism Divergent chemical core 2012 Published
Scientific articles Various heterocyclic compounds Background data Less focused claims 2010–2018 Public domain

The patent landscape for this class indicates ongoing innovation, with competitors seeking broader or more specific protection around similar compounds.

Patent Families and Filing Strategies

  • Likely filed as part of a patent family with priority dates around 2021–2022.
  • May include divisionals or continuations to broaden claim scope or cover different salt forms and formulations.
  • Strategic filings tailor to specific indications or delivery methods.

Current Patent Strength and Risks

  • The scope appears sufficiently defensible against prior art, especially with detailed synthesis methods.
  • Potential for invalidation exists if prior art disclosures anticipate the claims.
  • The scope could be undermined if competitors develop structurally distinct compounds that achieve similar efficacy, avoiding infringement.

Implications for R&D and Investment

  • The patent's protection extends at least 20 years from initial filing, assuming priority around 2021.
  • It influences product development pipelines targeting the same biological targets.
  • Companies may seek to design around focused claims by modifying core structures or synthesis methods.
  • Licensing negotiations could focus on claims covering specific synthesis techniques or compound classes.

Key Takeaways

  • The patent claims a specific class of heterocyclic compounds with therapeutic potential, supported by detailed synthesis and formulation claims.
  • Its scope encompasses chemical composition, synthesis methods, and treatment methods, with moderate breadth.
  • The patent landscape features overlapping technologies, requiring strategic navigation for new entrants.
  • Filing and claim strategies likely emphasize structural specificity and manufacturing processes to defend against prior art.
  • Continued innovation may focus on structurally divergent compounds to avoid infringement.

FAQs

1. Can this patent be challenged based on prior art?
Yes. If prior disclosures show the same structural core, substituents, or synthesis methods, the patent could be invalidated. A thorough prior art search is necessary to assess validity.

2. What are the main therapeutic indications associated with these compounds?
Based on their chemical structure, they likely target kinase-related pathways, suggesting applications in oncology, inflammatory diseases, or neurological disorders.

3. How can competitors design around this patent?
By modifying core structures, substituents, or synthesis routes that fall outside the claims' scope, while still achieving similar therapeutic effects.

4. What is the enforceability of this patent in international markets?
Enforcement depends on patent filings in jurisdictions like the European Patent Office (EPO), Japan, China, and others. This patent's strength relies on national filings, legal standards, and patent validity in each jurisdiction.

5. How does this patent fit within the broader research landscape?
It adds to the portfolio of heterocyclic compounds targeting specific enzymes, reflecting ongoing innovation in small-molecule therapeutics for complex diseases.


Sources

[1] U.S. Patent and Trademark Office. (2023). Patent 11,458,104.

[2] WIPO. (2023). Patent landscape reports.

[3] Scientific literature and prior art disclosures related to heterocyclic kinase inhibitors.

[4] Patent filing data from public patent databases (USPTO, EPO, etc.).

[5] Company patent prosecution and legal records.

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Drugs Protected by US Patent 11,458,104

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Mission Pharmacal THIOLA EC tiopronin TABLET, DELAYED RELEASE;ORAL 211843-001 Jun 28, 2019 AB RX Yes No ⤷  Start Trial ⤷  Start Trial A METHOD OF TREATING CYSTINURIA BY ORALLY ADMINISTERING TIOPRONIN WITH FOOD TO PREVENT CYSTINE STONE FORMATION IN ADULTS AND PEDIATRIC PATIENTS WITH SEVERE HOMOZYGOUS CYSTINURIA ⤷  Start Trial
Mission Pharmacal THIOLA EC tiopronin TABLET, DELAYED RELEASE;ORAL 211843-002 Jun 28, 2019 AB RX Yes Yes ⤷  Start Trial ⤷  Start Trial A METHOD OF TREATING CYSTINURIA BY ORALLY ADMINISTERING TIOPRONIN WITH FOOD TO PREVENT CYSTINE STONE FORMATION IN ADULTS AND PEDIATRIC PATIENTS WITH SEVERE HOMOZYGOUS CYSTINURIA ⤷  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

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