Patent US2691370A successfully refreshed from Google Patents.
US2691370A
Expired / Lapsed
US
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Instrument for heart surgery
Assignee: American Cystoscope Makers Inc
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Filing: 1952-03-27
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Granted: 1954-10-12
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Expires: 1972-03-27
Abstract
No abstract record available.
Inventors
- 👤 Wallace Frederick Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:33
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/00131; A61B1/00135; A61B1/12; A61B17/00; A61B17/32; A61B17/320016; A61B17/28; A61B17/29; A61B2017/2926; A61B2017/2932; A61B2017/2939
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) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |