US3918452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tampons impregnated with contraceptive compositions
Assignee: MEDICAL PHYSICS Corp
•
Filing: 1974-08-01
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Granted: 1975-11-11
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Expires: 1994-08-01
Abstract
Abstract Vaginal sponges and/or tampons impregnated with contraceptive compositions and methods of preventing conception or implantation by insertion in an animal organism of said sponge or tampon prior to exposure to conception.
Inventors
- 👤 Edward Cornfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/20; A61F13/26; A61K; A61K9/00; A61K9/0012; A61K9/0034; A61K9/0036
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
The method of preventing conception or implantation which comprises inserting into the vagina of a mammal a sponge tampon impregnated with microcapsules having a contraceptive composition prior to exposure to exteriorally inserted fluids and permitting said sponge tampon to remain in the vagina until at least an effective amount of said composition is released and leaving the sponge tampon in the vagina at least during the insertion of said exterior fluids so as to prevent conception or implantation from said fluids.
Claim 2
Independent Claim
81 words
The method of preventing conception or implantation which comprises inserting into the vagina of a mammal a sponge tampon impregnated with microcapsules having a contraceptive composition prior to exposure to exteriorally inserted fluids and permitting said sponge tampon to remain in the vagina until at least an effective amount of said composition is released and leaving the sponge tampon in the vagina at least during the insertion of said exterior fluids so as to prevent conception or implantation from said fluids.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein said comosition is microencapsulated in a sustained release form and said composition is caused to be released by the biological muscosa fluid.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said microcapsules include a spermicide and said spermicide is released with said contraceptive composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |