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|Title:||Graduated estrogen contraceptive|
|Abstract:||Contraceptive methods and delivery systems involving few undesirable side effects during administration are based on novel triphasic estrogen/progestogen combinations, wherein the amount of estrogen is increased stepwise over the three phases.|
|Inventor(s):||Boissonneault; Roger M. (Long Valley, NJ)|
|Assignee:||Warner-Lambert Company (Morris Plains, NJ)|
Patent Claim Types:|
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|Country||Document Number||Estimated Expiration||Supplementary Protection Certificate||SPC Country||SPC Expiration|
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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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