Patent US2420296A successfully refreshed from Google Patents.
US2420296A
Expired / Lapsed
US
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Work control mechanism for machine tools
Assignee: Leland Gifford Co
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Filing: 1944-06-08
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Granted: 1947-05-13
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Expires: 1964-06-08
Abstract
No abstract record available.
Inventors
- 👤 Benjamin S T Bishop
- 👤 Frank A Bicknell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/02; B24B19/022; Y; Y10; Y10T; Y10T82/00; Y10T82/25; Y10T82/2552; Y10T82/2562; Y10T82/2564
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) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |