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Details for Patent: 4,921,843

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Summary for Patent: 4,921,843

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): Pasquale; Samuel A. (Basking Ridge, NJ)
Assignee:
Application Number:07/260,447
Patent Claim Types:
see list of patent claims
Use; Composition; Dosage form; Delivery; Compound;

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International Patent Family for Patent: 4,921,843

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria175353► subscribe
Australia4497089► subscribe
Australia620940► 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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