US2539739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-speed hydraulic jack
Assignee: Individual
•
Filing: 1946-09-23
•
Granted: 1951-01-30
•
Expires: 1966-09-23
Abstract
No abstract record available.
Inventors
- 👤 Edward P Grime
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:16
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/42; F; F15; F15B; F15B11/00; F15B11/02; F15B11/022; F15B15/00; F15B15/18; F15B2211/00; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/7055; F15B2211/775
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |