US2711199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill extension
Assignee: Individual
•
Filing: 1952-06-13
•
Granted: 1955-06-21
•
Expires: 1972-06-13
Abstract
No abstract record available.
Inventors
- 👤 Oscar B Salsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:37
CPC Classifications
B; B27; B27C; B27C3/00; B27C3/08; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/665
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1315806A
Cited
US1091511A
Cited
US1297034A
Cited
US1408802A
Cited
US1866714A
Cited
US1912658A
Cited
US2291729A
Cited
US2357773A
Cited
US2501217A
Cited
US2571589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-20 | 1958-12-20 | 1959-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-20 | 1962-12-20 | 1963-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-20 | 1966-12-20 | 1967-06-21 | $7700.00 | Window Closed / Lapsed |