US2826219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically actuated piston controlled valve
Assignee: Quincy Compressor LLC
•
Filing: 1953-11-25
•
Granted: 1958-03-11
•
Expires: 1973-11-25
Abstract
No abstract record available.
Inventors
- 👤 George F Pfeifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:20
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/8663
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1406026A
Cited
US1339513A
Cited
US1623431A
Cited
US2296132A
Cited
US2456084A
Cited
US2666451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |