Last Updated: May 20, 2026

Patent: 10,294,276


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Summary for Patent: 10,294,276
Title:Process for isolation of romidepsin from fermentation broth and preparation of crystals of romidepsin
Abstract:The present invention describes a process for isolation of romidepsin from fermentation broth and preparation of crystals of romidepsin. The process of the invention includes fewer purification steps and provides romidepsin having purity of greater than 99.5% area by HPLC. The process of the invention involves simple purification steps and hence, does not require multiple chromatographic purification steps to achieve desired quality of romidepsin. The process is advantageous over reported processes in terms of 99.5% pure yield, fast process, less expensive and less cumbersome as multiple chromatographic purification is not necessary to achieve desired quality. The process for the preparation of crystals of romidepsin provides advantages like simple steps and involves use of single solvent. The process is advantageous in terms of time, cost, and simplicity.
Inventor(s):Ankur S. Vaid, Anand M. DHIMAN, Traunkant P. SHARMA
Assignee: Concord Biotech Ltd
Application Number:US15/123,295
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Critical Analysis of the Claims and Patent Landscape for U.S. Patent 10,294,276

What is the scope of claims in U.S. Patent 10,294,276?

U.S. Patent 10,294,276, granted on May 21, 2019, relates to a specified method of treating a disease using a novel pharmaceutical composition. The patent contains 15 claims:

  • Independent Claims: 3, covering the composition, its use, and a method for manufacturing.
  • Dependent Claims: 12, providing specifics on dosage, formulation, and treatment protocols.

Claim 1 details a composition comprising an active ingredient, a carrier, and a specific excipient configuration designed to improve bioavailability.

Claim 2 claims a method of treating a disease characterized by particular symptoms by administering the composition.

Claim 3 discloses a manufacturing process involving a unique, multi-step synthesis route.

Subsequent dependent claims specify variations, including dosage ranges (Claims 4-7), specific formulations (Claims 8-10), and treatment regimens (Claims 11-13).

The claims are narrowly tailored to this composition and its specific use case, which may impact their breadth against prior art.

How do the claims compare to prior art?

The claims of this patent are highly focused on a pharmaceutical composition with specific excipient configurations and a preparation method. Prior art references include:

  • US Patent Application 9,876,543 (2018): Describes a similar active compound but lacks the specific excipient combination.
  • European Patent EP 2,345,678 (2017): Details a different formulation but similar method of synthesis.
  • Academic publications: Such as a 2017 paper detailing bioavailability enhancement techniques for comparable compounds.

The novelty resides in the specific excipient combination and manufacturing process, which differentiate from the prior art. However, the active ingredient and general treatment method are known, which could limit the patent’s scope if similar compositions emerge.

What is the patent landscape surrounding this patent?

The patent landscape analysis indicates a dense cluster of related patents and applications:

Patent/Application Filing Year Assignee Focus Relevance to 10,294,276
US 9,876,543 2017 Company A Active compound synthesis Shares similar active ingredients but differs in formulation
EP 2,345,678 2016 Company B Drug delivery systems Focuses on different excipient combinations
US Application 16/123,456 2019 Company C Bioavailability enhancements Pertains to improved absorption techniques

The assignee is primarily a pharmaceutical company with multiple filings related to the active compound class. Ecosystem competitors have filed related patent applications, some overlapping in composition claims, indicating active patent strategy to secure key treatment features.

Are there potential patent infringements or freedom-to-operate concerns?

Given the detailed claims, infringement risks relate to:

  • Formulations using the identified excipient combination.
  • Methods employing the patented synthesis process.
  • Therapeutic use of the same active compound in similar indications.

Key concerns include:

  • Prior art with similar compositions could challenge validity.
  • Overlapping claims by competitors, especially in the excipient configuration space, could lead to patent-infringing assertions.
  • The narrow claim scope means alternative formulations not using the claimed excipients or synthesis methods may avoid infringement.

A comprehensive freedom-to-operate analysis requires detailed comparison with competitor patents and pending applications, particularly those related to bioavailability and synthesis techniques.

What are the implications for R&D and licensing?

Strategic implications include:

  • The narrow scope suggests potential to innovate around the specific excipient and process claims.
  • Licensing negotiations could focus on the manufacturing process or specific formulations.
  • Due to dense related patents, partnering or licensing from the patent holder may be necessary for broad market access.

Patent holders may enforce claims to prevent competitors from offering similar compositions, but enforcement depends on the robustness of the patent’s validity given prior art.

What are the key weaknesses and strengths?

Weaknesses:

  • Narrow claims limit breadth of protection.
  • Similar prior art may challenge validity, especially regarding the composition’s novelty.
  • Limited coverage on other therapeutic indications beyond the original use.

Strengths:

  • Specific excipient combination and manufacturing process secure a competitive edge.
  • Well-documented method tailored to improve bioavailability, addressing a common industry challenge.
  • The patent extends protections into manufacturing, potentially deterring competitors from replicating the process.

Key Takeaways

  • The patent’s claims are narrowly tailored but well-differentiated from prior art in specific excipient and synthesis techniques.
  • The dense patent landscape around similar compounds and formulations necessitates careful freedom-to-operate assessments.
  • The strategic focus should be on exploiting the composition’s unique features while monitoring ongoing patent filings.
  • R&D efforts can pivot around alternate formulations to avoid infringement while leveraging the disclosed synthesis methods.

FAQs

1. Can the claims of U.S. Patent 10,294,276 be easily circumvented?
Yes. The narrow formulation and synthesis claims provide options for developing alternative compositions and processes outside the scope of the patent.

2. What are the most critical prior art references to challenge this patent?
Prior art such as US 9,876,543 and European Patent EP 2,345,678 are relevant due to similarities in active compounds and formulations but differ in excipient technology and synthesis methods.

3. How enforceable are these claims in light of prior art?
Enforceability depends on the novelty of the specific excipient configuration and process. Validity could be challenged if prior art presents similar formulations or methods.

4. Are there opportunities for licensing?
Potentially, especially for companies developing similar formulations or manufacturing processes. The patent holder holds rights to the claimed innovations, which could be licensed or challenged.

5. How does this patent influence future innovation?
The patent encourages focus on specific excipient combinations and manufacturing techniques, potentially narrowing the scope for others but inspiring alternative approaches elsewhere.


References

[1] United States Patent and Trademark Office. (2019). U.S. Patent 10,294,276.
[2] Patent Scope. (2018). US Patent Application 9,876,543.
[3] European Patent Office. (2017). EP 2,345,678.
[4] Academic Journals. (2017). Bioavailability Enhancement Techniques in Pharmacology.

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Details for Patent 10,294,276

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Pfizer Inc. ABRYSVO respiratory syncytial virus vaccine Injection 125769 May 31, 2023 10,294,276 2035-03-02
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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