US2309077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill
Assignee: Sullivan Machinery Co
•
Filing: 1941-05-07
•
Granted: 1943-01-19
•
Expires: 1961-05-07
Abstract
No abstract record available.
Inventors
- 👤 Charles F Osgood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:44
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/084; E21B15/00; E21B15/006; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1558; Y10T74/1587; Y10T74/1592
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1946-01-18 | 1946-07-20 | 1947-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-01-18 | 1950-07-20 | 1951-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-01-18 | 1954-07-20 | 1955-01-19 | $7700.00 | Window Closed / Lapsed |