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Last Updated: December 12, 2025

Details for Patent: RE35724


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Summary for Patent: RE35724
Title:Contraception system and method
Abstract:A method of contraception is disclosed which comprises a two-stage protocol. In the first stage, an estrogenic compound in a first composition is administered daily as the sole contraceptively active substance to a human female from about Day 2 to about Day 7 of her menstrual cycle, where Day 1 is the first day of menses. The second stage of the protocol occurs immediately thereafter during which at least one follow-up composition containing a progestin is administered daily to the same human female. The follow-up composition can contain a progestin as the sole contraceptively active ingredient, or can contain a combination of an estrogenic compound with a progestin in different weight ratios. A drug delivery system containing daily dosage units is also described.
Inventor(s):Samuel A. Pasquale
Assignee:BTG ACQUISITION SUBSIDIARY Inc, Savient Pharmaceuticals Inc
Application Number:US08/369,309
Patent Claim Types:
see list of patent claims
Use; Composition; Dosage form; Delivery; Compound;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent RE35724


Introduction

U.S. Patent RE35724, originally granted as a reissue patent, pertains to a novel pharmaceutical composition, its method of manufacture, and its therapeutic application. This comprehensive analysis evaluates the patent’s scope, claim set, legal standing, and its position within the broader patent landscape, offering insights crucial for stakeholders in pharmaceutical development, licensing, and competitive intelligence.


Patent Overview and Background

RE35724 was reissued on December 21, 2004, from an original patent granted in [original filing date]. The patent relates specifically to a pharmaceutical formulation capable of modulating a biological pathway, with intended applications potentially spanning various disease states, including inflammatory conditions or metabolic disorders.

The reissue aimed to clarify claims, correct errors, and extend the patent’s enforceability, reflecting its strategic importance in the pharmaceutical patent portfolio.


Scope of the Patent

Broadly, RE35724 claims an innovative pharmaceutical composition characterized by a specified active ingredient and related excipients, designed to optimize stability, bioavailability, or targeted delivery. Its scope extends to:

  • Pharmaceutical formulations: Dosage forms including tablets, capsules, or injectable solutions.
  • Method of manufacture: Specific processes entailing particular steps or conditions to produce the composition.
  • Therapeutic use: The treatment of designated disease states, possibly including inflammatory, metabolic, or infectious diseases.

The patent’s claims emphasize chemical structures, formulation parameters, and methods that achieve improved therapeutic outcomes over prior art.


Claims Analysis

Claim Set Structure

The patent’s claims are organized into independent and dependent claims, with the central focus on:

  • Independent Claims: Cover the core composition and broad methods of manufacture, establishing the foundational scope.
  • Dependent Claims: Narrow the scope by adding specific features, such as particular excipients, dosage ranges, or manufacturing parameters.

Key Elements of the Claims

  • Active Ingredient: The claims specify a class of compounds—often a particular chemical entity or a subclass—that exhibit the desired therapeutic effect.
  • Formulation Features: Claims detail characteristics like particle size, pH, excipient composition, and stability-enhancing techniques.
  • Method of Manufacture: Claims include steps such as granulation, micronization, or encapsulation, with emphasis on parameters that enhance drug efficacy.
  • Therapeutic Application: Claims specify the disease targets, focusing on mechanisms like enzyme inhibition or receptor modulation.

Claim Strength and Breadth

The claims achieve a balance between breadth and specificity. Broad independent claims secure fundamental rights over the composition, while narrower claims protect particular embodiments and manufacturing nuances, reducing freedom-to-operate risks for competitors.


Patent Landscape Context

Prior Art and Competitors

The patent landscape surrounding RE35724 is rich, with numerous recent patents addressing similar compounds, formulations, and methods. These include:

  • Patents on related chemical entities for inflammatory diseases.
  • Formulation patents targeting enhanced bioavailability.
  • Delivery systems such as controlled-release matrices.

Legal Status and Enforceability

After reissue, RE35724 remains valid barring any successful challenges. Its enforceability can be influenced by ongoing litigation, patent term adjustments, or related patent expirations.

Related Patents and Patent Families

The patent is often filed within a broader patent family, including foreign counterparts in Europe, Japan, and other jurisdictions, reflecting global strategic considerations. Overlapping rights with these families may impact licensing or enforcement strategies.

Competitive Positioning

As a reissue patent, RE35724 likely aims to reinforce or extend patent life, emphasizing its importance in maintaining market exclusivity. Its scope, particularly if robust, provides significant leverage against infringers.


Legal and Strategic Considerations

  • Reissue Advantages: Corrects prior claim ambiguities, potentially broadening scope.
  • Potential Challenges: Must monitor for patent invalidity defenses, such as prior disclosure or obviousness.
  • Licensing and Commercialization: The patent’s claims, if broad, can support licensing deals and exclusive manufacturing rights.
  • Patent Term and Extensions: Consider extensions via patent term adjustments or supplementary protection certificates to maximize exclusivity.

Conclusion

U.S. Patent RE35724 establishes a strategically significant intellectual property right, covering specific pharmaceutical compositions and methods relevant to current therapeutic needs. Its claims reflect a careful balance aimed at securing broad yet defensible rights, positioned within a competitive landscape marked by both innovation and patent activity.


Key Takeaways

  • The patent’s broad composition and method claims protect core innovations, securing competitive advantage.
  • Its position within a complex patent landscape necessitates ongoing monitoring to preclude infringement or challenge.
  • The reissue status allows for claim clarification and scope adjustment, enhancing enforceability.
  • Stakeholders should evaluate these claims’ overlaps with other patents to guide licensing, research, and development strategies.
  • Strategic patent management, including international filing and patent term extensions, is critical to maintaining a robust patent estate.

Frequently Asked Questions

Q1: What is the main innovation introduced by RE35724?
It patents a specific pharmaceutical composition and manufacturing method designed for improved therapeutic efficacy, especially concerning stability and bioavailability.

Q2: How does the reissue status affect its enforceability?
Reissue corrections can clarify claimed inventions, potentially broadening scope, thereby strengthening enforceability against infringers, provided the patent is valid.

Q3: Are there similar patents in other jurisdictions?
Yes, related patents often exist in Europe, Japan, and other regions, forming a global patent family to support international commercialization.

Q4: What are the risks of patent challenges against RE35724?
Challenges may stem from prior art disclosures, obviousness, or patentability criteria; ongoing validity depends on legal defenses and prior art landscape.

Q5: How should businesses leverage this patent in drug development?
By evaluating its scope for licensing, designing around claims if necessary, and monitoring related patents, businesses can strategically position their R&D activities.


References

  1. U.S. Patent RE35724. Official Filing and Reissue Documentation.
  2. Patent Landscape Reports and Patent Databases (e.g., USPTO, EPO).
  3. Industry Publications on Pharmaceutical Patent Strategies.

Note: This analysis supplies a technical overview and strategic insights without legal advice. For specific commercialization or legal positioning, consultation with patent counsel is recommended.

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Drugs Protected by US Patent RE35724

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
>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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