US2381923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic drive
Assignee: Individual
•
Filing: 1940-11-23
•
Granted: 1945-08-14
•
Expires: 1960-11-23
Abstract
No abstract record available.
Inventors
- 👤 Obtresal Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:06
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/05; B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; B23Q5/266; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/40553; F15B2211/415; F15B2211/41509; F15B2211/42; F15B2211/428; F15B2211/455; F15B2211/465
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) | 1948-08-13 | 1949-02-12 | 1949-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-08-13 | 1953-02-12 | 1953-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-08-13 | 1957-02-12 | 1957-08-14 | $7700.00 | Window Closed / Lapsed |