Patent US2990853A successfully refreshed from Google Patents.
US2990853A
Expired / Lapsed
US
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Rotary valve
Assignee: Cameron Solutions Inc
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Filing: 1958-01-23
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Granted: 1961-07-04
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Expires: 1978-01-23
Abstract
No abstract record available.
Inventors
- 👤 Chester L Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:09
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F16; F16K; F16K3/00; F16K3/02; F16K3/04; F16K3/06; F16K3/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86831; Y10T137/86839; Y10T137/86863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US533388A
Cited
US905605A
Cited
GB581814A
Cited
US2420972A
Cited
US2696219A
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US2745434A
Cited
US2827924A
Cited
US2744540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |