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US3563235A
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Intrauterine contraceptive method
Assignee: GD Searle LLC
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Filing: 1968-09-18
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Granted: 1971-02-16
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Expires: 1988-09-18
Abstract
Abstract A method of contraception is disclosed characterized by providing for the presence of elemental copper or zinc in the uterine cavity. This invention is preferably practiced by wrapping a small amount of wire or foil or by placing a sleeve around a conventional intrauterine device prior to implantation. In a modification of this method, two different metals are employed to provide improved effectiveness.
Inventors
- 👤 Jaime A Zipper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:42
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
32 words
A method as in claim 1 wherein a said elemental metal is attached to an intrauterine device effective to retain said metal in the uterine cavity over a prolonged period of time.
Claim 2
Dependent Claim
19 words
A method as in claim 1 wherein said metal in is in the form of a pharmaceutically acceptable alloy.
Claim 3
Dependent Claim
39 words
A method as in claim 1 wherein two dissimilar pharmaceutically acceptable metals are placed in the uterine cavity in contact with each other, at least one of said metals being selected from the group consisting of copper and zinc.
Claim 4
Dependent Claim
14 words
A method as in claim 4 wherein said dissimilar metals are silver and copper.
Claim 5
Dependent Claim
22 words
A method as in claim 1 wherein said elemental metal has an exposed surface area of at least about 20 square millimeters.
Claim 6
Dependent Claim
42 words
An intrauterine contraceptive device adaptable to insertion in the uterine cavity and capable of being retained therein for prolonged periods of time, said device including a contraceptively effective amount of an elemental metal selected from the group consisting of copper and zinc.
Claim 7
Dependent Claim
24 words
An intrauterine contraceptive device as in claim 7 wherein said elemental metal has an exposed surface area of at least about 20 square millimeters.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |