US2648312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control operator for hydraulic pumps
Assignee: HPM Development Corp
•
Filing: 1951-11-28
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Granted: 1953-08-11
•
Expires: 1971-11-28
Abstract
No abstract record available.
Inventors
- 👤 Warren R Tucker
- 👤 Pittman Glen Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:07
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/18; F04C14/22; F04C14/223; F15; F15B; F15B11/00; F15B11/02; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20546; F15B2211/20553; F15B2211/21; F15B2211/212; F15B2211/255; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/41; F15B2211/411; F15B2211/42; F15B2211/426; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/55; F15B2211/60; F15B2211/635; F15B2211/6355; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/76
Claims Analysis
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References Cited (Backward Citations)
US2239882A
Cited
US2302922A
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US2443345A
Cited
US2455837A
Cited
US2417858A
Cited
US2447707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |