US3379406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm valve with water hammer preventer
Assignee: Hays Manufacturing Co
•
Filing: 1965-03-24
•
Granted: 1968-04-23
•
Expires: 1985-03-24
Abstract
No abstract record available.
Inventors
- 👤 Leonard S Greer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:45
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/02; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE6451C
Cited
US1910237A
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US2069069A
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US2664916A
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US2907340A
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US2933257A
Cited
US2900163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |