Patent US2772066A successfully refreshed from Google Patents.
US2772066A
Expired / Lapsed
US
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Pilot controlled diaphragm valve
Assignee: Individual
•
Filing: 1952-12-22
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Granted: 1956-11-27
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Expires: 1972-12-22
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Keeton
- 👤 Fields E Kesler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:36
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; G05D7/0113; F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/365
Claims Analysis
Total Claims: 0
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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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |