Patent US2653492A successfully refreshed from Google Patents.
US2653492A
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US
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Bimetallic key blank
Assignee: Curtis Industries Inc
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Filing: 1951-08-10
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Granted: 1953-09-29
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Expires: 1971-08-10
Abstract
No abstract record available.
Inventors
- 👤 Abrams Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:51
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; E; E05; E05B; E05B19/00; E05B19/04; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/778; Y10T70/7791; Y10T70/7876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US28466A
Cited
US104823A
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US917894A
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US1777929A
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US1837114A
Cited
US2132315A
Cited
US2197673A
Cited
US2301531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |