US2917751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical heart
Assignee: INTERSCIENCE RES CORP
•
Filing: 1956-04-10
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Granted: 1959-12-22
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Expires: 1976-04-10
Abstract
No abstract record available.
Inventors
- 👤 William J Fry
- 👤 Francis J Fry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:21
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/50; A61M60/585; A61M60/10; A61M60/122; A61M60/196; A61M60/40; A61M60/424; A61M60/438; A61M60/441; A61M60/80; A61M60/855; A61M60/89; A61M60/892; A61M60/126; A61M60/148; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |