US1992912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake system for drilling equipment
Assignee: Parkersburg Rig and Reel Co
•
Filing: 1933-06-07
•
Granted: 1935-02-26
•
Expires: 1953-06-07
Abstract
No abstract record available.
Inventors
- 👤 Mater Robert Griffin De La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:34
CPC Classifications
B; B65; B65H; B65H59/00; B65H59/02; B65H59/04; B66; B66D; B66D5/00; B66D5/02; B66D5/026; B66D5/06; B66D5/10; B66D5/24
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) | 1938-02-25 | 1938-08-27 | 1939-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-25 | 1942-08-27 | 1943-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-25 | 1946-08-27 | 1947-02-26 | $7700.00 | Window Closed / Lapsed |