US2210144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control apparatus
Assignee: Individual
•
Filing: 1939-06-22
•
Granted: 1940-08-06
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Expires: 1959-06-22
Abstract
No abstract record available.
Inventors
- 👤 Herbert O Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:58
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20561; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/315; F15B2211/3157; F15B2211/31576; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/515; F15B2211/5159; F15B2211/55
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) | 1943-08-06 | 1944-02-05 | 1944-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-06 | 1948-02-05 | 1948-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-06 | 1952-02-05 | 1952-08-06 | $7700.00 | Window Closed / Lapsed |