US2291729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling apparatus
Assignee: Individual
•
Filing: 1940-01-16
•
Granted: 1942-08-04
•
Expires: 1960-01-16
Abstract
No abstract record available.
Inventors
- 👤 Albert C Koett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:42
CPC Classifications
B; B27; B27C; B27C3/00; B27C3/08; B23; B23Q; B23Q5/00; B23Q5/02; B23Q5/04; B23Q5/043; B23Q5/045; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/91; Y10T408/93; Y10T74/00; Y10T74/19; Y10T74/19502; Y10T74/19521; Y10T74/19642; Y10T74/1966; Y10T74/19665
Claims Analysis
Total Claims: 0
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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) | 1945-08-03 | 1946-02-02 | 1946-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-03 | 1950-02-02 | 1950-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-03 | 1954-02-02 | 1954-08-04 | $7700.00 | Window Closed / Lapsed |