Patent US3312214A successfully refreshed from Google Patents.
US3312214A
Expired / Lapsed
US
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Intra-uterine device
Assignee: Individual
•
Filing: 1966-06-06
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Granted: 1967-04-04
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Expires: 1986-06-06
Abstract
No abstract record available.
Inventors
- 👤 Burdick Charles Lalor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:06
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A TREFOIL INTRA-UTERINE DEVICE WHICH COMPRISES AN INERT ENDLESS MATERIAL IN THE SHAPE OF THREE CONTINUOUS FREELY MOVABLE ADJACENTLY-POSITIONED LOOPS SAID LOOPS BEING INTERCONNECTED SUCH THAT THE TWO TERMINATING PORTIONS OF EACH LOOP CONTINUE SMOOTHLY INTO THE TERMINATING PORTIONS OF THE ADJACENT LOOPS, SAID INTRA-UTERINE DEVICE CAPABLE OF BEING DEFORMED BY THE APPLICATION OF A SMALL AMOUNT OF FORCE AND BEING SUFFICIENTLY ELASTIC TO RETURN SUBSTANTIALLY TO ITS ORIGINAL SHAPE WHEN THE FORCE IS REMOVED.
Claim 2
Dependent Claim
75 words
A TREFOIL INTRA-UTERINE DEVICE WHICH COMPRISES AN INERT ENDLESS MATERIAL IN THE SHAPE OF THREE CONTINUOUS FREELY MOVABLE ADJACENTLY-POSITIONED LOOPS SAID LOOPS BEING INTERCONNECTED SUCH THAT THE TWO TERMINATING PORTIONS OF EACH LOOP CONTINUE SMOOTHLY INTO THE TERMINATING PORTIONS OF THE ADJACENT LOOPS, SAID INTRA-UTERINE DEVICE CAPABLE OF BEING DEFORMED BY THE APPLICATION OF A SMALL AMOUNT OF FORCE AND BEING SUFFICIENTLY ELASTIC TO RETURN SUBSTANTIALLY TO ITS ORIGINAL SHAPE WHEN THE FORCE IS REMOVED.
References Cited (Backward Citations)
US2122579A
Cited
US2176559A
Cited
US3077879A
Cited
US3200815A
Cited
US3250271A
Cited
US3253590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |