Patent US160543A successfully refreshed from Google Patents.
US2868044A
Expired / Lapsed
US
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Cutting depth control device
Assignee: Gardner Denver Inc
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Filing: 1955-03-03
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Granted: 1959-01-13
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Expires: 1975-03-03
Abstract
No abstract record available.
Inventors
- 👤 Walter C Chaffee
- 👤 Claude L Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:54
CPC Classifications
B; B23; B23B; B23B49/00; B23B49/003; B23B49/006; B23B49/008; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/38; Y10T408/3839; Y10T408/55; Y10T408/564
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) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |