US2829664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow control valve with remote pressure control
Assignee: Shell Development Co
•
Filing: 1953-03-10
•
Granted: 1958-04-08
•
Expires: 1973-03-10
Abstract
No abstract record available.
Inventors
- 👤 Mountford Lawrence Almeric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:25
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/122; F16K31/1225; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2599; Y10T137/2605; Y10T137/263; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7789
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB113581A
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US20314A
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US208344A
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US313750A
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FR339086A
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US915204A
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US1178528A
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US1986429A
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US2082325A
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US2098696A
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US2335067A
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US2365650A
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US2602627A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |