US1811666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic power driven pipe wrench
Assignee: Hill & Foster Co Inc
•
Filing: 1929-12-14
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Granted: 1931-06-23
•
Expires: 1949-12-14
Abstract
No abstract record available.
Inventors
- 👤 Walter W Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:53
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16; E21B19/161; E21B19/164; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17213; Y10T279/27
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) | 1934-06-22 | 1934-12-22 | 1935-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-22 | 1938-12-22 | 1939-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-22 | 1942-12-22 | 1943-06-23 | $7700.00 | Window Closed / Lapsed |