US2181049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic drive
Assignee: Oilgear Co
•
Filing: 1939-01-19
•
Granted: 1939-11-21
•
Expires: 1959-01-19
Abstract
No abstract record available.
Inventors
- 👤 James K Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:14
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H23/1806; F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/44; F16H61/444; F16H61/456; Y; Y10; Y10T; Y10T83/00; Y10T83/889; Y10T83/896
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) | 1942-11-20 | 1943-05-22 | 1943-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-20 | 1947-05-22 | 1947-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-20 | 1951-05-22 | 1951-11-21 | $7700.00 | Window Closed / Lapsed |