Patent US3411744A successfully refreshed from Google Patents.
US3411744A
Expired / Lapsed
US
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Washer assembly for water valve
Assignee: MAURICE R PRATHER
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Filing: 1966-02-23
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Granted: 1968-11-19
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Expires: 1986-02-23
Abstract
No abstract record available.
Inventors
- 👤 Maurice R Prather
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:08
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/48; F16K1/487
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US359246A
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GB190925749A
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US2081616A
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US2057233A
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US2194961A
Cited
US2277251A
Cited
FR1205672A
Cited
US3053502A
Cited
US3103340A
Cited
US3275287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |