US2002893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill pipe protector
Assignee: Individual
•
Filing: 1933-05-19
•
Granted: 1935-05-28
•
Expires: 1953-05-19
Abstract
No abstract record available.
Inventors
- 👤 Charles K Holt
- 👤 Ira B Marsh
- 👤 John B Merritt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:38
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1042; E21B17/105; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49876
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) | 1938-05-27 | 1938-11-26 | 1939-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-27 | 1942-11-26 | 1943-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-27 | 1946-11-26 | 1947-05-28 | $7700.00 | Window Closed / Lapsed |