Patent US3177489A successfully refreshed from Google Patents.
Patent US2985424A successfully refreshed from Google Patents.
US2985424A
Expired / Lapsed
US
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Valve closure and seat element
Assignee: Crane Co
•
Filing: 1956-10-31
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Granted: 1961-05-23
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Expires: 1976-10-31
Abstract
No abstract record available.
Inventors
- 👤 Andrew E Anderson
- 👤 Edward W Urbaniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:51
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; F16K1/42; F16K1/422; F16K1/427
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190518993A
Cited
US1093117A
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US1616672A
Cited
US2223509A
Cited
DE946692C
Cited
US2645449A
Cited
US2770443A
Cited
US2767956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |