US2804751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure actuated control for hydraulic power systems
Assignee: Schroeder Brothers Corp
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Filing: 1953-06-05
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Granted: 1957-09-03
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Expires: 1973-06-05
Abstract
No abstract record available.
Inventors
- 👤 John S Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:11
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; E; E21; E21B; E21B19/00; E21B19/08; E21B19/086; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20538; F15B2211/30; F15B2211/32; F15B2211/321; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/42; F15B2211/428; F15B2211/45; F15B2211/455; F15B2211/70; F15B2211/71; F15B2211/7107; F15B2211/78; F15B2211/783; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T408/00; Y10T408/16; Y10T408/17; Y10T408/172; Y10T408/65; Y10T408/675; Y10T408/6757
Claims Analysis
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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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |