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Serving leading biopharmaceutical companies globally:

Cantor Fitzgerald
Express Scripts
Farmers Insurance
Daiichi Sankyo

Generated: November 21, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,390,531

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Summary for Patent: 4,390,531

Title: Method of contraception using peak progestogen dosage
Abstract:A method of contraception and a pharmaceutical package for effecting the method are disclosed. The method comprises a three phase sequence of estrogen/progestogen administration which is a daily sequence of unit dosages over a repeating cycle, which dosage sequence comprises, for one cycle: (a) administering, as phase one, about 20-40 .mu.g of ethinyl estradiol, (or of other estrogen in an amount sufficient to result in an equivalent effect) and about 0.3-0.8 mg of norethindrone (or of other progestogen in an amount sufficient to result in an equivalent effect) each day for 5-8 days, followed by; (b) administering, as phase two, the same dosage of estrogen and twice the dosage of progestogen each day as was administered each day in phase one, for 7-11 days, followed by; (c) administering, as phase three, the same dosage of estrogen and the same dosage of progestogen each day as was administered each day in phase one, for 3-7 days, followed by; (d) administering, as phase four, no therapeutically active dosage, i.e. either no treatment or a placebo each day for 6-8 days, with the proviso that the total number of days in phases one through three is 21.
Inventor(s): Edgren; Richard A. (Woodside, CA)
Assignee: Syntex Pharmaceuticals International Ltd. (Hamilton, BM)
Application Number:06/291,533
Patent Claim Types:
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International Patent Family for Patent: 4,390,531

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia560922► Subscribe
Australia8697682► Subscribe
Canada1198057► Subscribe
Germany3229612► Subscribe
United Kingdom2104779► Subscribe
Hong Kong26087► Subscribe
Malaysia8700596► Subscribe
New Zealand201539► Subscribe
Singapore93686► 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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Serving leading biopharmaceutical companies globally:

Argus Health
Farmers Insurance
Harvard Business School

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