Patent US2773528A successfully refreshed from Google Patents.
US2773528A
Expired / Lapsed
US
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Keyhole saw with rotary adjustment for the blade
Assignee: LOUIS GRINGER
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Filing: 1955-10-31
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Granted: 1956-12-11
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Expires: 1975-10-31
Abstract
No abstract record available.
Inventors
- 👤 Gringer Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
B; B23; B23D; B23D49/00; B23D49/10; B23D49/14; B23D51/00; B23D51/08; B23D51/10; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5198
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) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |