US2818292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill
Assignee: Individual
•
Filing: 1954-04-23
•
Granted: 1957-12-31
•
Expires: 1974-04-23
Abstract
No abstract record available.
Inventors
- 👤 Carl D Graber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:14
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; Y; Y10; Y10T; Y10T403/00; Y10T403/55; Y10T403/556; Y10T403/557
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US104576A
Cited
US1054181A
Cited
US1879856A
Cited
US2005498A
Cited
US2463859A
Cited
US2569275A
Cited
US2608103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |