Patent US2820973A successfully refreshed from Google Patents.
US2820973A
Expired / Lapsed
US
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Cam actuated work clamp means movable continuously in a rotary path
Assignee: Individual
•
Filing: 1955-08-03
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Granted: 1958-01-28
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Expires: 1975-08-03
Abstract
No abstract record available.
Inventors
- 👤 Horace E Farmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:45
CPC Classifications
B; B23; B23G; B23G1/00; B23G1/02; B23G1/08; Y; Y10; Y10T; Y10T408/00; Y10T408/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US372541A
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US490901A
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US504971A
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US1090299A
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US1159790A
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US1508974A
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US1990188A
Cited
US2759202A
Cited
US2740973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |