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Patent US3452749A successfully refreshed from Google Patents.
US3452749A
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Contraceptive device
Assignee: EDWIN H RIEDELL
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Filing: 1966-10-27
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Granted: 1969-07-01
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Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Riedell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:36
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR511534A
Cited
US2041424A
Cited
US2365296A
Cited
US2597924A
Cited
US2856920A
Cited
US3230953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |