US2671641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear adapter for drill pipes
Assignee: Individual
•
Filing: 1951-07-30
•
Granted: 1954-03-09
•
Expires: 1971-07-30
Abstract
No abstract record available.
Inventors
- 👤 Jackson G Hinkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:16
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1085; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/49893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1229417A
Cited
US1616666A
Cited
US1764769A
Cited
US1891615A
Cited
US1889060A
Cited
US2295873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |