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Details for Patent: 6,620,435

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Patent 6,620,435 protects ACZONE and is included in two NDAs.

This patent has thirty-five patent family members in twenty-two countries.

Summary for Patent: 6,620,435

Title: Compositions for topical application of therapeutic agents
Abstract:The present invention generally relates to pharmaceutical compositions that enable control of drug, delivery properties and the development of optimal drug delivery strategies customized for particular drugs and particular diseases. The composition includes a dissolved pharmaceutical that has the capacity to permeate the stratum corneum layer of the epidermis and become available systemically, and a pharmaceutical in a microparticulate state that does not readily cross the stratum corneum of the epidermis. The dissolved and microparticulate pharmaceuticals may be the same or different pharmaceuticals. Methods for the preparation and use of the compositions are also provided. In a preferred embodiment, the invention finds particular use in a formulation for the topical application of dapsone for the treatment of acne. In another preferred embodiment, the invention finds particular use for the treatment of herpes lesions.
Inventor(s): Osborne; David W. (The Woodlands, TX)
Assignee: ViroTex Corporation (The Woodlands, TX)
Application Number:09/236,909
Patent Claim Types:
see list of patent claims
Composition; Formulation; Use; Delivery;
Patent Metrics:
Source: PatentQuant.com
Field: Pharmaceuticals
Back Citations: 11th percentile
Forward Citations: 0th percentile

Applicant Tradename Generic Name Dosage NDA Approval Date Type RLD Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use
Allergan Inc
ACZONE
dapsone
GEL;TOPICAL207154-001Feb 24, 2016RXYes6,620,435► subscribeY
Allergan
ACZONE
dapsone
GEL;TOPICAL021794-001Jul 7, 2005RXYes6,620,435► subscribeY
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Non-Orange Book Patents for Patent: 6,620,435

For Orange Book-listed patents (shown in the main table above) generic applications must certify that the listed patents are expired, invalid, or will not be infringed by generic entry.

The non-Orange Book patents listed below do not require formal certifications, so they do not automatically impede generic entry. Instead, they represent potential opportunities for branded firms to block generic entry through patent infringment challenges.

Patent No. Title Estimated Patent Expiration
6,060,085 Compositions and methods for topical application of therapeutic agents► subscribe
5,863,560 Compositions and methods for topical application of therapeutic agents► subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Because of the complexity of determining patent expiration dates it is advisable to have patent counsel verify freedom to operate.

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International Patent Family for Patent: 6,620,435

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Slovenia1485059► subscribe
Portugal1485059► subscribe
Portugal957900► subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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