Patent US2946251A successfully refreshed from Google Patents.
US2946251A
Expired / Lapsed
US
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Sheet metal shear having dual tractive cutters
Assignee: Individual
•
Filing: 1955-05-13
•
Granted: 1960-07-26
•
Expires: 1975-05-13
Abstract
No abstract record available.
Inventors
- 👤 Charles F Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:51
CPC Classifications
B; B23; B23D; B23D19/00; B23D19/04; Y; Y10; Y10T; Y10T83/00; Y10T83/768; Y10T83/7755; Y10T83/7763; Y10T83/7776; Y10T83/778; Y10T83/7788; Y10T83/7809; Y10T83/783; Y10T83/869; Y10T83/8771; Y10T83/929; Y10T83/9372; Y10T83/9403
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB270732A
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US1744224A
Cited
US1913951A
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US2060600A
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US2216108A
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US2439794A
Cited
US2708480A
Cited
US2772734A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |