US3548417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heart valve having a flexible wall which rotates between open and closed positions
Assignee: JANE N KISCHER
•
Filing: 1967-09-05
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Granted: 1970-12-22
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Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 Ronnie G Kischer
- 👤 Jane N Kischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:27
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; F16K15/1471; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA515372A
Cited
US2662724A
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US2682057A
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US3047013A
Cited
US3118468A
Cited
US3197788A
Cited
US3279996A
Cited
US3416562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |