Polymeric acid contraceptive devices
Patent 4360013 Issued on November 23, 1982. Estimated Expiration Date: 
April 21, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 21, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3067745 3433225 3865108 3916898 Intravaginal contraceptive and drug release device and method for making and using same Patent #: 4274410 InventorApplicationNo. 06/142239 filed on 04/21/1980US Classes:128/832, With contraceptive, spermacidal, or antifertility agent604/515To or from the female reproductory tractExaminersPrimary: Millin, V.Assistant: Swisher, Nancy A. B. Attorney, Agent or FirmInternational ClassA61K 9/00 (20060101)AbstractA disposable non-woven sponge vaginal contraceptive device is made of alginic acid or related polysaccharides bearing carboxylic acid functionality and a method of making same is disclosed.Other References
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