US4297341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spermicidal composition
Assignee: University of Illinois Foundation
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Filing: 1980-05-09
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Granted: 1981-10-27
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Expires: 2000-05-09
Abstract
Abstract A water-soluble complex comprising polyvinylpyrrolidone and gossypol is an effective spermicide.
Inventors
- 👤 Donald P. Waller
- 👤 Lourens J. D. Zaneveld
- 👤 Harry H. S. Fong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:33
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/74; A61K31/785; A61K31/787; A61K31/79; Y; Y10; Y10S; Y10S424/00; Y10S424/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
31 words
A spermicidal composition for vaginal application comprising the complex formed from about 90 to about 50% by weight of polyvinylpyrrolidone and from about 10 to about 50% by weight of gossypol.
Claim 2
Dependent Claim
31 words
A spermicidal composition for vaginal application comprising the complex formed from about 90 to about 50% by weight of polyvinylpyrrolidone and from about 10 to about 50% by weight of gossypol.
Claim 3
Dependent Claim
11 words
The spermicidal composition of claim 1 including a pharmaceutically acceptable carrier.
Claim 4
Dependent Claim
50 words
The spermicidal composition of claim 2 wherein the complex contains about 80% by weight of polyvinylpyrrolidone and about 20% by weight of gossypol, the complex being admixed with saline carrier to provide a concentration of from about 5 to about 40 mg of the complex in 1 ml of saline.
Claim 5
Dependent Claim
46 words
The spermicidal composition of claim 2 wherein the complex contains about 80% by weight of polyvinylpyrrolidone and about 20% by weight of gossypol, the complex being admixed with a gelatin carrier in a concentration of about 100 mg of complex in about 1 ml of gelatin.
References Cited (Backward Citations)
US2973300A
Cited
US2918411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |