US2755058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot controlled fluid pressure operated valve
Assignee: Parker Appliance Co
•
Filing: 1952-02-28
•
Granted: 1956-07-17
•
Expires: 1972-02-28
Abstract
No abstract record available.
Inventors
- 👤 Margrave Wilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:13
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/363
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US193800A
Cited
US318899A
Cited
US695676A
Cited
US962551A
Cited
US1074379A
Cited
US2213147A
Cited
US2227629A
Cited
US2230644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |