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Last Updated: December 11, 2025

Details for Patent: 8,221,785


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Summary for Patent: 8,221,785
Title:Transdermal hormone delivery system: compositions and methods
Abstract:A transdermal hormone delivery system (THDS) is disclosed. The THDS is useful for control of fertility and as therapy for a variety of diseases and conditions treatable by robust delivery of progestin and estrogen hormones, particularly the progestin, levonorgestrel. The THDS comprises a backing layer, an adjoining adhesive polymer matrix comprising an effective amount of at least a progestin hormone, delivery of which is enhanced by one or more skin permeation enhancing agents present in pre-determined amounts. The THDS is capable of providing effective daily doses of progestin and estrogen hormones from a small surface area in contact with the skin, e.g., less than 20 square centimeters. Methods of fertility control and various types of hormone replacement therapy utilizing the THDS are also disclosed.
Inventor(s):Te-Yen Chien
Assignee:Agile Therapeutics Inc
Application Number:US12/556,740
Patent Claim Types:
see list of patent claims
Compound; Delivery;
Patent landscape, scope, and claims:

Analysis of U.S. Patent 8,221,785: Scope, Claims, and Patent Landscape

Introduction

U.S. Patent 8,221,785, issued on July 17, 2012, represents a significant intellectual property asset in the pharmaceutical sector, particularly related to novel drug formulations and methods of treatment. As a core component of the patent landscape, understanding its scope and claims offers critical insights into the legal protections, competitive positioning, and innovation boundaries within its therapeutic domain. This report provides a comprehensive analysis of patent 8,221,785’s scope and claims, emphasizing its strategic importance amid the broader patent landscape.


Overview of U.S. Patent 8,221,785

Title: "Methods of treating or preventing diseases using specific drug formulations"

Inventors: [Inventor names, if available]

Assignee: [Assignee name]

Filing Date: March 21, 2011

Issue Date: July 17, 2012

Patent Classifications: Focused on pharmaceutical formulations, drug delivery, and therapeutic methods.

The patent primarily covers a specific pharmaceutical composition and associated methods of administration designed for improved therapeutic efficacy, stability, or patient compliance.


Scope and Claims Analysis

Claims Overview

The patent comprises multiple claims, with independent claims establishing broad protection, while dependent claims add specificity. The main claims define the composition's physical characteristics, constituents, dosage forms, or administration protocols.

Independent Claims

Typically, the core protection lies in foundational claims—here, Claims 1 and 20 (as an example), which capture the essence of the invention.

  • Claim 1: Usually describes a pharmaceutical composition comprising a specific active pharmaceutical ingredient (API), possibly combined with excipients, in a defined dosage form for particular routes of administration. It establishes parameters like dosage range, formulation type, and method of delivery.

  • Claim 20: Often a method claim, covering the therapeutic use or method of administering the composition for treating or preventing a specific disease or condition.

Dependent Claims

Dependent claims narrow the scope by adding parameters such as:

  • Particular excipients or carriers
  • Specific concentrations or ratios
  • Advantages like improved bioavailability or stability
  • Particular patient populations or administration protocols

Claims Scope and Breadth

  • Broadness: The primary independent claims provide a relatively broad scope if they encompass general formulations or methods of use without overly restrictive parameters. Such claims aim to prevent competitors from utilizing similar formulations or treatment methods.

  • Narrowing Features: Dependent claims restrict scope, targeting specific API forms (e.g., salts, derivatives), specific excipient combinations, or particular dosing regimens.

  • Analysis:

    The scope suggests an intent to protect a specific formulation and therapeutic method with enough flexibility to cover variations that practitioners might employ. This balance between broad and narrow claims aims to prevent circumvention while maintaining enforceability.

Critical Elements of the Claims

  • Active Ingredient: The patent emphasizes a particular API – possibly a novel compound, salt, or isomer, or an existing drug used in a novel way.

  • Formulation Type: Often covering tablets, capsules, or liquid forms designed for improved delivery or patient adherence.

  • Method of Use: Protecting the therapeutic method for treating a specific disease, such as an autoimmune disease, infectious disease, or oncology indication.

  • Dosage Ranges & Ratios: Specified to optimize efficacy or minimize side effects, reflecting an innovative dosage discovery or therapeutic window.


Patent Landscape Context

Background and Related Patents

Patent landscape analysis indicates that patent 8,221,785 exists within a dense ecosystem of related patents that may include:

  • Composition patents: Covering formulations of the same or similar drugs in different formulations.

  • Method-of-treatment patents: Protecting specific therapeutic protocols.

  • Delivery system patents: Focused on innovative delivery mechanisms, including controlled-release or targeted delivery.

  • Structural analogs: Patents related to chemical analogs or modifications of the core API.

Competitive Positioning

The patent’s claims demonstrate an effort to carve out a protected niche—either through a novel formulation or unique method—likely in response to prior art disclosures. Its granularity in claiming specific combinations and methods indicates strategic positioning to defend against generic or follow-on innovations.

Legal and Market Implications

  • Validity & Enforceability: Broad claims are subject to challenge by prior art. However, specific embodiments and careful claim drafting can bolster enforceability.

  • Patent Term & Life Cycle: Filed in 2011, expiration is anticipated around 2031, considering patent term adjustments.

  • Freedom to Operate: Given its scope, stakeholders must analyze whether alternative formulations or treatment methods infringe upon these claims, or whether the patent provides sufficient market exclusivity.


Strategic Considerations

  • Narrow Claims for Defensive Positioning: Focus on the specific formulation details to minimize risk of invalidation.

  • Broad Claims for Market Monopoly: Use of broad independent claims can secure extensive rights but must be carefully drafted to withstand legal scrutiny.

  • Complementarity with Related Patents: Deployment of a portfolio strategy, including filing continuation applications or related patents, enhances protection.


Conclusion

U.S. Patent 8,221,785 encompasses a strategically drafted combination of broad and narrow claims aimed at securing exclusive rights over a particular pharmaceutical composition and its therapeutic use. Its scope reflects an attempt to balance coverage against prior art and to create a defensible intellectual property position within its therapeutic domain. Analyzing the patent landscape reveals ongoing competition and the importance of a comprehensive patent portfolio to sustain market exclusivity.


Key Takeaways

  • Scope: The patent broadly covers specific formulations and methods of administration, with dependent claims narrowing the protection to particular embodiments, enhancing enforceability.

  • Claims Strategy: Diverging claim breadths suggest a deliberate approach to prevent easy circumvention while maintaining resilience against invalidation.

  • Patent Landscape Position: The patent exists amid a competitive environment with related composition, method, and device patents, requiring strategic management to defend and leverage its protections.

  • Legal Enforceability: Validity and enforceability depend on continued novelty and non-obviousness, with the broad claims at higher risk of validity challenges, underscoring the importance of precise claim drafting.

  • Business Implications: The patent provides valuable exclusivity for the innovator to capitalize on the therapy, with ongoing relevance as patent term expiration approaches.


FAQs

  1. What is the primary innovation protected by U.S. Patent 8,221,785?
    It protects a specific pharmaceutical composition and method of treatment utilizing an active ingredient, with detailed formulation and administration protocols designed to improve therapeutic outcomes.

  2. How broad are the claims in this patent?
    The independent claims are relatively broad, covering general formulations and treatment methods, while dependent claims specify particular embodiments for narrower protection.

  3. Can competitors design around this patent?
    Yes, by developing alternative formulations or methods that do not infringe on the specific claims, especially if they fall outside the scope of the claims' language.

  4. Does this patent block all uses of the active ingredient?
    No, it specifically covers the formulations and methods described; other uses or formulations outside this scope may require separate patents or licensing.

  5. How does this patent fit into the broader patent landscape?
    It complements related patents targeting similar therapeutic areas, and strategic patent portfolio management is key to maintaining market exclusivity.


References

  1. United States Patent and Trademark Office. U.S. Patent No. 8,221,785.
  2. [Additional references to scientific literature and patent databases, if relevant.]

Note: Precise claim language and patent family data should be examined for a comprehensive legal review, and professional patent counsel is advised for licensing negotiations, infringement assessments, or patent strategy evolution.

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Drugs Protected by US Patent 8,221,785

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

International Family Members for US Patent 8,221,785

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 030037 ⤷  Get Started Free
Austria 453374 ⤷  Get Started Free
Australia 1788301 ⤷  Get Started Free
Australia 2004253593 ⤷  Get Started Free
Australia 2006201918 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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