Patent US2852039A successfully refreshed from Google Patents.
US2852039A
Expired / Lapsed
US
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Fluid operated valve
Assignee: Individual
•
Filing: 1955-06-20
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Granted: 1958-09-16
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Expires: 1975-06-20
Abstract
No abstract record available.
Inventors
- 👤 John H Dotter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:06
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA507353A
Cited
GB190615604A
Cited
US2132030A
Cited
US2469921A
Cited
US2503827A
Cited
US2637303A
Cited
US2706467A
Cited
US2694413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |