US2570308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic chuck for pulldown devices
Assignee: ConocoPhillips Co
•
Filing: 1946-01-28
•
Granted: 1951-10-09
•
Expires: 1966-01-28
Abstract
No abstract record available.
Inventors
- 👤 Clarence D Beeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:45
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/089; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17615
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1196033A
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US1094972A
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US1690469A
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US1718998A
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US1811939A
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US1904256A
Cited
US2114305A
Cited
US2393603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |