Patent US4351326A successfully refreshed from Google Patents.
US4351326A
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Copper wire for intrauterina contraceptive devices and a method for manufacturing the same
Assignee: Bayer Oy
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Filing: 1980-10-03
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Granted: 1982-09-28
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Expires: 2000-10-03
Abstract
Abstract A copper wire for intrauterine contraceptive devices is disclosed as having a core wire of a flexible tough metal nobler than copper and a copper coating fixed on the core wire by means of a thin diffusion layer.
Inventors
- 👤 Ahti A. Kosonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:51
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12403; Y10T428/12431; Y10T428/12438; Y10T428/12444
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A method for preventing conception comprising placing in the uterus an intrauterine contraceptive device having a wire form a corrosion-resistant core wire of some ductile metal nobler than copper and a coating of copper fixed onto the core wire by means of a thin diffusion layer.
Claim 2
Independent Claim
46 words
A method for preventing conception comprising placing in the uterus an intrauterine contraceptive device having a wire form a corrosion-resistant core wire of some ductile metal nobler than copper and a coating of copper fixed onto the core wire by means of a thin diffusion layer.
References Cited (Backward Citations)
SU156146A1
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US2434992A
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US3181935A
Cited
US3877885A
Cited
US3703896A
Cited
US4117838A
Cited
US4198966A
Cited
FR2431286A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |