Patent US3574865A successfully refreshed from Google Patents.
US3306286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intrauterine device
Assignee: Schueler & Co
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Filing: 1965-04-13
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Granted: 1967-02-28
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Expires: 1985-04-13
Abstract
No abstract record available.
Inventors
- 👤 Ahmed Mary Aftab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:38
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
AN INTRAUTERINE DEVICE COMPRISING A SINGLE ELONGATED ROD OF FLEXIBLE POLYETHYLENE PREFORMED IN THE SHAPE OF AN OUTER TRIANGLE, A COPLANAR TRIANGLE WITHIN THE OUTER TRIANGLE, AND AN OVALOID COPLANAR SHAPE WITHIN THE INNER TRIANGLE, AN END REGION OF A SIDE OF THE OUTER TRIANGLE HAVING AN OUTWARD EXTENSION THEREFROM SUBSTANTIALLY ALIGNED WITH THE LONGER AXIS OF THE OVALOID SHAPE, A TRANSVERSE BORE DEFINED IN THE EXTENSION AT ITS FREE END REGION, AND A LENGTH OF NYLON STRING THREADED THROUGH THE BORE AND HAVING A KNOT ABOUT THE EXTENSION, BOTH END PORTIONS OF THE NYLON STRING BEYOND THE KNOT EXTENDING A SUBSTANTIAL DISTANCE FROM THE BORE.
Claim 2
Dependent Claim
106 words
AN INTRAUTERINE DEVICE COMPRISING A SINGLE ELONGATED ROD OF FLEXIBLE POLYETHYLENE PREFORMED IN THE SHAPE OF AN OUTER TRIANGLE, A COPLANAR TRIANGLE WITHIN THE OUTER TRIANGLE, AND AN OVALOID COPLANAR SHAPE WITHIN THE INNER TRIANGLE, AN END REGION OF A SIDE OF THE OUTER TRIANGLE HAVING AN OUTWARD EXTENSION THEREFROM SUBSTANTIALLY ALIGNED WITH THE LONGER AXIS OF THE OVALOID SHAPE, A TRANSVERSE BORE DEFINED IN THE EXTENSION AT ITS FREE END REGION, AND A LENGTH OF NYLON STRING THREADED THROUGH THE BORE AND HAVING A KNOT ABOUT THE EXTENSION, BOTH END PORTIONS OF THE NYLON STRING BEYOND THE KNOT EXTENDING A SUBSTANTIAL DISTANCE FROM THE BORE.
References Cited (Backward Citations)
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |