Patent US3374787A successfully refreshed from Google Patents.
US3374787A
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Intra-uterine contraceptive device
Assignee: RCA Corp
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Filing: 1965-11-18
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Granted: 1968-03-26
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Expires: 1985-11-18
Abstract
No abstract record available.
Inventors
- 👤 Fred L Hatke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:16
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
143 words
A CONTRACEPTIVE INTRA-UTERINE DEVICE COMPRISING: A SMOOTH, FLEXIBLE, RESILIENT, TUBULAR RING-LIKE MEMBER ADAPTED TO BE PLACED WITH ITS PRIMARY PLANE IN THE FRONTAL PLANE OF A UTERUS WITH THE ACTUAL SHAPE OF SAID MEMBER CONFORMING TO THE INTERNAL SHAPE AND DIMENSIONS OF SAID UTERUS AT THE POSITION OF SAID MEMBER IN SAID UTERUS, A METALLIC ELECTRICALLY CONDUCTIVE WIRE RING INTERNAL TO SAID MEMBER AND CONFORMING IN SHAPE TO THAT OF SAID MEMBER, SAID WIRE RING HAVING A VALUE OF INDUCTANCE DETERMINED BY THE SHAPE THEREOF AND THEREFORE OF THE SHAPE OF SAID MEMBER WHEN IN SAID UTERUS, AND A CAPACITOR INTERNAL TO SAID MEMBER AND CONNECTED TO SAID WIRE RING TO FORM WITH THE INDUCTANCE OF SAID WIRE RING A RESONANT CIRCUIT HAVING A RESONANT FREQUENCY DETERMINED BY THE VALVE OF SAID INDUCTANCE AND THEREFORE THE POSITION OF SAID MEMBER IN SAID UTERUS.
References Cited (Backward Citations)
US3051896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |