US2901125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derricks
Assignee: J H HOLAN CORP
•
Filing: 1954-06-22
•
Granted: 1959-08-25
•
Expires: 1974-06-22
Abstract
No abstract record available.
Inventors
- 👤 Herman J Troche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:58
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/18; B66C2700/00; B66C2700/06; B66C2700/062; B66C2700/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1631627A
Cited
US2204716A
Cited
US2310159A
Cited
US2575262A
Cited
US2497844A
Cited
US2649342A
Cited
US2541970A
Cited
US2616666A
Cited
US2517813A
Cited
US2611580A
Cited
US2740535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |