Patent US2937008A successfully refreshed from Google Patents.
US2937008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed turbo-drill with reduction gearing
Assignee: Individual
•
Filing: 1956-09-24
•
Granted: 1960-05-17
•
Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Whittle Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/02; E21B4/006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1482702A
Cited
US1681094A
Cited
US1790460A
Cited
US2044349A
Cited
US2188546A
Cited
US2591488A
Cited
US2584555A
Cited
US2655344A
Cited
US2806672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |