Patent US4804937A successfully refreshed from Google Patents.
US2708970A
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US
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Punch holder with controllable lifting spring
Assignee: WALES STRIPPIT CORP
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Filing: 1951-01-26
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Granted: 1955-05-24
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Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
- 👤 Paul H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:02
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/34; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2135; Y10T83/215; Y10T83/2155; Y10T83/2159; Y10T83/869; Y10T83/8788; Y10T83/8821; Y10T83/8855
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US388977A
Cited
US494311A
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US770239A
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US1459320A
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US1533236A
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US2163641A
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US2421500A
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US2412066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |