Patent US2520495A successfully refreshed from Google Patents.
US2520495A
Expired / Lapsed
US
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Shear press back gauge
Assignee: Cleveland Crane and Engineering Co
•
Filing: 1947-02-14
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Granted: 1950-08-29
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Expires: 1967-02-14
Abstract
No abstract record available.
Inventors
- 👤 Roy F Dehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:04
CPC Classifications
B; B23; B23D; B23D33/00; B23D33/10; Y; Y10; Y10T; Y10T83/00; Y10T83/566; Y10T83/5669; Y10T83/5787; Y10T83/5796; Y10T83/647; Y10T83/6569; Y10T83/748; Y10T83/7593; Y10T83/764; Y10T83/869; Y10T83/8798; Y10T83/8817
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1489081A
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US1852726A
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US1895440A
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US1874296A
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US1863005A
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US2071402A
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US2047322A
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GB480000A
Cited
US2125539A
Cited
US2222095A
Cited
US2350540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |