Patent US1883073A successfully refreshed from Google Patents.
US1883073A
Expired / Lapsed
US
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Work-gripping means for well drilling apparatus
Assignee: DOHENY STONE DRILL CO
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Filing: 1928-01-04
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Granted: 1932-10-18
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Expires: 1948-01-04
Abstract
No abstract record available.
Inventors
- 👤 Stone Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:31
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/10; Y; Y10; Y10T; Y10T279/00; Y10T279/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-10-18 | 1936-04-18 | 1936-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-10-18 | 1940-04-18 | 1940-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-10-18 | 1944-04-18 | 1944-10-18 | $7700.00 | Window Closed / Lapsed |