Contraceptive sponge - diaphragm bilayer
Patent 4369773 Issued on January 25, 1983. Estimated Expiration Date: 
November 5, 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.
November 5, 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 2020107 2309868 2580133 InventorApplicationNo. 06/204294 filed on 11/05/1980US Classes:424/433, Depot, pellet, matrix, or suppository128/832, With contraceptive, spermacidal, or antifertility agent128/837, Diaphragm604/515To or from the female reproductory tractExaminersPrimary: Rosenbaum, C. FredInternational ClassesA61F 6/00 (20060101)A61F 6/08 (20060101) AbstractAn intravaginal insert, serving as a mechanical and chemical contraceptive barrier is described. The insert consists of a thin circular disc bilayer of a resilient and fluid absorbent sponge, preferably made of collagen, laminated on the inside with a soft membrane. Both layers of laminated sponge are connected at the circumference to form a pocket with a small opening. A spermicide, preferably a detergent, is deposited within the matrix of the sponge, which is also buffered to pH 4 to 5. Into a pocket made from this composite material a silastic ring is inserted before wetting the sponge with tap water and inserting it into the upper vault of the vagina to cover the cervix in a similar manner to the standard diaphragm. | |
