Patent US2850929A successfully refreshed from Google Patents.
US2850929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill pipe spinner
Assignee: Jersey Production Research Co
•
Filing: 1954-07-06
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Granted: 1958-09-09
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Expires: 1974-07-06
Abstract
No abstract record available.
Inventors
- 👤 Robert R Crookston
- 👤 Jr Thomas J Bolling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:31
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16; E21B19/168
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1617509A
Cited
US1889060A
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US2000221A
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US2287768A
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US2450934A
Cited
US2536458A
Cited
US2717135A
Cited
US2652666A
Cited
US2690847A
Cited
US2692059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |