Patent US3030978A successfully refreshed from Google Patents.
US3030978A
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Pump valve structure
Assignee: FMC Corp
•
Filing: 1958-08-27
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Granted: 1962-04-24
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Expires: 1978-08-27
Abstract
No abstract record available.
Inventors
- 👤 Clifford J Griffith
- 👤 James P Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:21
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/02; F04B53/00; F04B53/10; F04B53/102; F04B53/1022; F04B53/1032; F04B53/109; F04B53/14; F04B53/16; F04B53/162; F04B53/164; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7937
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US272198A
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GB185448A
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US1983163A
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US2007677A
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US2192425A
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US2282490A
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US2304991A
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US2306012A
Cited
DE853367C
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US2797704A
Cited
US2845085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |