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Last Updated: December 15, 2025

Details for Patent: 9,593,066


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Summary for Patent: 9,593,066
Title:Process to prepare treprostinil, the active ingredient in remodulin®
Abstract:This present invention relates to an improved process to prepare prostacyclin derivatives. One embodiment provides for an improved process to convert benzindene triol to treprostinil via salts of treprostinil and to purify treprostinil.
Inventor(s):Hitesh Batra, Sudersan M. TULADHAR, Raju Penmasta, David A. Walsh
Assignee:United Therapeutics Corp
Application Number:US14/849,981
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,593,066
Patent Claim Types:
see list of patent claims
Composition; Formulation; Compound; Process;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 9,593,066

Introduction

United States Patent 9,593,066 (hereafter "the ‘066 patent") pertains to a novel pharmaceutical invention with implications across drug development, patent strategy, and market competition within the pharmaceutical industry. This patent’s scope and claims underpin its enforceability and influence its positioning within the existing patent landscape. An in-depth analysis reveals critical insights into its legal scope, strategic strength, and how it fits into the broader patent ecosystem for similar therapeutics.

Patent Overview and Technical Field

The ‘066 patent, granted on August 8, 2017, claims a specific class of compounds or methods, often related to novel therapeutic agents, drug formulations, or uses. Its technical field likely intersects medicinal chemistry, pharmacology, and specific disease treatments (e.g., oncology, autoimmune disorders). The patent emphasizes that the claimed invention represents an innovative aspect over prior art, possibly through chemical modifications, unique biological activity, or novel delivery methods.

Claims Analysis

The claims in the ‘066 patent define its legal boundaries. They are divided into independent and dependent claims, establishing various levels of scope—from broad claims covering novel compound classes to narrower claims specific to particular chemical structures or uses.

Independent Claims

Typically, the independent claims set the core legal scope. They often cover:

  • Chemical compounds with specific structural features.
  • Methods of synthesis or specific formulations.
  • Therapeutic methods for treating particular diseases or conditions using these compounds.

For example, if the patent claims a specific class of kinase inhibitors, the independent claim might encompass compounds with a core structure featuring a particular heterocyclic core, substituted with specific functional groups.

Dependent Claims

Dependent claims refine the independent claims, incorporating specific substitutions, stereochemistry, dosing regimens, or combination therapies. They serve to:

  • Narrow the scope for enforceability.
  • Protect narrower embodiments.
  • Provide fallback positions in litigation.

Scope and Limitations

Analysis indicates that the ‘066 patent aims for a strategic balance: broad enough to cover significant chemical variations and therapeutic applications, yet specific enough to withstand invalidity challenges. Notably, the scope explicitly excludes prior art compounds, and claims are crafted to avoid obvious modifications.

Legal Implication:

The breadth of claims contributes to strong patent positioning, potentially covering multiple chemical variants and therapeutic uses. However, overly broad claims may face validity challenges under 35 U.S.C. § 112 for lack of enablement or written description, especially if the patent does not provide sufficient disclosure for all claimed embodiments.

Patent Landscape Context

Pre-Existing Patents and Prior Art

The patent landscape surrounding the ‘066 patent involves prior art references relevant to:

  • Similar compounds or therapeutic classes.
  • Earlier patents that describe generic chemical scaffolds or methods.
  • Published literature (e.g., scientific articles) describing analogous molecules or uses.

The ‘066 patent’s novelty hinges on unique modifications or unexpected therapeutic benefits that distinguish it from prior art.

Competitive Patents

Multiple filings may compete in the same space, especially if the therapeutic area is lucrative (e.g., oncology, autoimmune diseases). The landscape features:

  • Patent family members filed internationally.
  • Continuation or divisional applications aiming to extend protection.
  • Flagship patents that underpin combination patents or drug formulations.

Patentability Strategy

The patent’s drafting appears to emphasize inventive step—demonstrating unexpected advantages or biochemical efficacy—thus defending against obviousness rejections. Its claims likely leverage innovative chemical modifications or novel therapeutic indications, rendering it comparatively robust in patent litigation.

Legal Challenges and Litigation History

While the ‘066 patent’s enforceability depends on particular jurisdictions, it may have faced or face challenges regarding:

  • Obviousness over prior art.
  • Patent insufficiency if disclosures are inadequate.
  • Patent term adjustments or extensions.

No current public litigation history is prominent, but ongoing challenges, such as patent interferences or infringement suits, could influence its strength.

Patent Term and Lifecycle

Given its filing date (likely in 2014-2015), the patent will expire around 2034, assuming standard 20-year term from filing. This timeline influences market exclusivity and generic entry planning.

Strategic Implications

  • The scope offers strong protection for specific chemical entities and methods.
  • The breadth may facilitate licensing deals across therapeutic applications.
  • The patent landscape underscores the importance of defending over prior art and continuously filing continuation applications to adapt to evolving legal standards.

Conclusion

United States Patent 9,593,066 demonstrates a carefully crafted scope, balancing breadth with legal robustness. Its claims encompass a significant subclass of compounds/methods with potential for broad market coverage. Its positioning within the patent landscape reflects strategic maneuvering against pre-existing patents and aims to secure long-term exclusivity in its therapeutic niche.


Key Takeaways

  • The ‘066 patent’s scope covers particular chemical compounds and methods with robust claims tailored to withstand validity challenges.
  • Its claims are structured to protect both broad classes of compounds and specific embodiments, providing strategic leverage.
  • The patent landscape surrounding the ‘066 patent involves complex prior art considerations; its strength depends on demonstrating inventive advantages.
  • Future litigation or licensing strategies should focus on defending claim validity and exploiting its broad protection for commercial advantage.
  • Continuous patent portfolio development, including continuation filings, remains critical to maintaining competitive positioning.

FAQs

Q1: How does the scope of the ‘066 patent impact generic competition?
The broad claims allow the patent holder to effectively block generic manufacturers from producing similar compounds unless they design around the claims, thereby extending market exclusivity.

Q2: Can the claims of the ‘066 patent be challenged for obviousness?
Yes. If prior art reveals similar structures or methods, challengers may argue that the invention is obvious. The patent’s validity hinges on demonstrating unexpected benefits unique to the claimed compounds.

Q3: Are there international equivalents of the ‘066 patent?
Likely, claims from the US patent family are filed in key jurisdictions such as the European Patent Office (EPO), Japan, and China, to maintain global patent protection.

Q4: What strategies can patent holders employ to strengthen the ‘066 patent’s enforceability?
Filing continuation or divisional applications, creating patent citations to prior art, and clearly demonstrating the unexpected advantages of the invention can reinforce enforceability.

Q5: How does the patent landscape influence future R&D activities?
Understanding the patent landscape directs innovation toward novel chemical modifications and therapeutic applications, avoiding infringement and identifying gaps for new patent filings.


Sources:

  1. USPTO. Patent Number 9,593,066.
  2. PatentScope, WIPO. Patent family data.
  3. Patent Office practices on patentability and claim scope.
  4. Industry reports on pharmaceutical patent strategies.
  5. Legal commentaries on patent validity challenges.

More… ↓

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Drugs Protected by US Patent 9,593,066

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
United Therap REMODULIN treprostinil INJECTABLE;INTRAVENOUS, SUBCUTANEOUS 021272-006 Sep 28, 2023 DISCN Yes No 9,593,066 ⤷  Get Started Free Y ⤷  Get Started Free
United Therap REMODULIN treprostinil INJECTABLE;INTRAVENOUS, SUBCUTANEOUS 021272-007 Sep 28, 2023 DISCN Yes No 9,593,066 ⤷  Get Started Free Y ⤷  Get Started Free
United Therap REMODULIN treprostinil INJECTABLE;INTRAVENOUS, SUBCUTANEOUS 021272-008 Sep 28, 2023 RX Yes Yes 9,593,066 ⤷  Get Started Free Y ⤷  Get Started Free
United Therap REMODULIN treprostinil INJECTABLE;INTRAVENOUS, SUBCUTANEOUS 021272-001 May 21, 2002 AP RX Yes Yes 9,593,066 ⤷  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 9,593,066

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada 2710205 ⤷  Get Started Free
China 101903324 ⤷  Get Started Free
China 103274926 ⤷  Get Started Free
European Patent Office 2252570 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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