US3699951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for suppressing fertility
Assignee: Alza Corp
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Filing: 1970-01-19
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Granted: 1972-10-24
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Expires: 1990-01-19
Abstract
Abstract Fertility suppression in a female mammal is achieved with a device for insertion and retention in the uterus in the form of a flexible, resilient body of polymeric material having an elastic memory. The body has an ellipsoidal shape and a fluted surface. When inserted into the uterine cavity in a compacted state, the body assumes an ellipsoidal configuration. Preferably, the device contains an anti-fertility agent, most preferably progesterone, and is permeable to passage of the anti-fertility agent at a low rate. Upon insertion in the uterus, the device releases a fertility suppressing amount of the anti-fertility agent to the uterus.
Inventors
- 👤 Alejandro Zaffaroni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:31
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0034; A61K9/0039; A61F; A61F6/00; A61F6/06; A61F6/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
16 words
The intrauterine device of claim 1 wherein the flutes are disposed substantially longitudinally of said body.
Claim 2
Dependent Claim
16 words
The intrauterine device of claim 1 wherein the flutes are disposed substantially helically about said body.
Claim 3
Dependent Claim
16 words
The intrauterine device of claim 1, wherein the flutes are disposed substantially horizontally about said body.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |