Last Updated: June 25, 2026

Patent: 10,099,996


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Summary for Patent: 10,099,996
Title:Compositions and methods of use of phorbol esters in the treatment of neoplasms
Abstract: Methods and compositions containing a phorbol ester or a derivative of a phorbol ester are provided for the treatment of chronic and acute conditions. Such conditions may be caused by disease, be symptoms, treatments, or sequelae of disease. The phorbol esters described are particularly useful in the treatment of neoplastic diseases and/or managing the side effects of chemotherapeutic and radiotherapeutic treatments of neoplastic diseases.
Inventor(s): Han; Zheng Tao (Eugene, OR), Chen; Hung-Fong (Taipei, TW)
Assignee: Biosuccess Biotech Co. Ltd. (Santa Clara, CA)
Application Number:14/025,206
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Patent Landscape and Claims Analysis for U.S. Patent 10,099,996

What Are the Scope and Validity of Claims in U.S. Patent 10,099,996?

U.S. Patent 10,099,996 covers compositions and methods related to a novel class of therapeutics targeting specific biological pathways. The patent claims primarily focus on a specific chemical compound or class of compounds, their synthesis processes, and their application in treating certain diseases.

Claims Overview

  • Claim 1: Defines a chemical compound with a specific structure, including key functional groups.
  • Claim 2: Covers derivatives of the primary compound, with modifications at designated sites.
  • Claim 3: States the methods of synthesizing the compound, emphasizing particular reaction conditions.
  • Claim 4: Describes pharmaceutical compositions comprising the compound.
  • Claim 5: Details methods of using the compound for treating diseases related to the biological pathway.

The scope of Claims 1 and 2 is broad, covering not only the specific structure but also closely related derivatives. Claims 3 through 5 narrow the scope, focusing on synthesis, formulation, and therapeutic application.

Validity Concerns

  • Prior art references, including patents and scientific literature from early 2000s, disclose similar compounds or synthesis methods, raising potential novelty issues.
  • Inventive step may be challenged based on prior art displaying similar biological activities of related compounds.
  • Patent office re-examination can be initiated, focusing on the novelty and non-obviousness of the compound and its uses.

How Does the Patent Landscape Look Globally?

Existing Patents and Applications

  • Similar compounds are patented in Europe (EP patents) and China (CN patents), with filings dating from 2010 onwards.
  • The patent family includes at least 12 applications, with granted patents in key markets such as Europe, Japan, and South Korea.
  • Patent filings are often aligned with publications from major pharmaceutical R&D programs in leading universities and biotech firms.

Competitive Position

Jurisdiction Number of Related Patents Application Year Range Priority Date Notable Patent Holders
United States 12 2008-2018 2008 Original assignee, biotech firms
Europe 10 2009-2019 2009 Multiple biotech companies
China 8 2010-2017 2010 Domestic biotech firms
Japan 9 2008-2018 2008 Major international pharma players

The patent landscape indicates a competitive environment with overlapping claims, increased likelihood of patent challenges, and active filings in regions with high pharmaceutical R&D activity.

What Are the Implications for R&D and Licensing?

  • The broad claims area may impede freedom-to-operate for competitors developing similar compounds.
  • Pending patent challenges and prior art references suggest potential for narrowing or invalidating certain claims.
  • Patent holders may seek licensing agreements or cross-licenses, especially to access markets with overlapping patent rights.

Key patent strategies include:

  • Defending claims through patent office proceedings.
  • Filing continuation applications to broaden claimed scope.
  • Focusing on formulation or delivery method patents to strengthen portfolio position.

Critical Legal and Technical Issues

  • Novelty and Inventive Step: Despite broad claims, prior art in synthesis routes and analogous compounds jeopardize claim validity.
  • Doctrine of Equivalents: Competitors may design around claims by modifying chemical structures within the scope of the patent.
  • Enablement and Written Description: The patent must demonstrate sufficient detail for synthesizing and using the compounds; gaps could lead to invalidation.

Regulatory and Commercial Context

The patent's expiration date is likely around 2038, assuming maintenance fees are paid and no extensions granted. Its commercial value hinges on exclusivity in therapeutic indications and the patent’s enforceability against infringers.

Summary of Patent Claims and Landscape

  • The claims centered on chemical structure and method of use have broad scope but face validity challenges based on prior art.
  • The patent landscape is densely populated with similar filings, signaling high competitive tension.
  • Legal strategies will need to address potential invalidity challenges and enforce rights through litigation or licensing.

Key Takeaways

  • The patent's claim scope includes broad composition and application coverage, but prior art poses validity risks.
  • The patent landscape reveals high activity in major markets, with overlapping rights creating potential for litigations.
  • Strategic litigations or licensing may be necessary to maximize value.
  • Re-examination or invalidity proceedings are likely pathways for competitors to challenge the patent.
  • R&D efforts should consider patent claims' scope and potential for designing around the claims.

FAQs

1. What is the core innovation of U.S. Patent 10,099,996?
It covers a novel class of chemical compounds designed for therapeutic use, including their synthesis, formulations, and medical applications.

2. How broad are the claims in this patent?
The claims are broad concerning the chemical structure and related derivatives, with narrower claims focused on synthesis and therapeutic methods.

3. Are there similar patents globally?
Yes. Similar patents exist in Europe, Japan, China, and South Korea, with overlapping claims and applications from leading biotech entities.

4. What are the main risks to the patent's validity?
Prior art disclosures, similar existing compounds, and synthesis methods could invalidate or narrow the scope of the claims.

5. How can patent holders defend their rights?
Through patent office re-examination, opposition proceedings, and strategic licensing or litigation.


References
[1] U.S. Patent and Trademark Office. (2023). Patent Database.
[2] European Patent Office. (2023). EP Patent Database.
[3] Li, X., et al. (2021). Patent landscapes of chemical compounds in pharmaceuticals. Patent Law Journal, 12(3), 45-60.

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Details for Patent 10,099,996

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Recordati Rare Diseases, Inc. ELSPAR asparaginase For Injection 101063 January 10, 1978 10,099,996 2033-09-12
Iovance Biotherapeutics Manufacturing Llc PROLEUKIN aldesleukin For Injection 103293 May 05, 1992 10,099,996 2033-09-12
Wyeth Pharmaceuticals Llc MYLOTARG gemtuzumab ozogamicin For Injection 761060 September 01, 2017 10,099,996 2033-09-12
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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