Patent US2919111A successfully refreshed from Google Patents.
US2919111A
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Shearing device and method for use in well drilling
Assignee: California Research LLC
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Filing: 1955-12-30
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Granted: 1959-12-29
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Expires: 1975-12-30
Abstract
No abstract record available.
Inventors
- 👤 Kingsley M Nicolson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:07
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/08; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/061; E21B33/062; E21B33/063; E21B33/064; Y; Y10; Y10T; Y10T137/00; Y10T137/8376; Y10T83/00; Y10T83/869; Y10T83/8821; Y10T83/8835; Y10T83/8858
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1802564A
Cited
US1802565A
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US1949672A
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US2512783A
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US2592197A
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US2650068A
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US2690320A
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US2808229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |