US2709931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep driller drive
Assignee: BOYAR SCHULTZ CORP
•
Filing: 1954-09-30
•
Granted: 1955-06-07
•
Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 William S Bunnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:22
CPC Classifications
B; B23; B23G; B23G1/00; B23G1/02; B23G1/04; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5152; Y10T29/5154; Y10T29/5155; Y10T408/00; Y10T408/36; Y10T408/37
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2581258A
Cited
US2645952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |