Patent US2612019A successfully refreshed from Google Patents.
US2612019A
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Propellent injection system with safety valve to cut off fluid pressure supply
Assignee: Bristol Siddeley Engines Ltd
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Filing: 1949-12-27
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Granted: 1952-09-30
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Expires: 1969-12-27
Abstract
No abstract record available.
Inventors
- 👤 Halford Frank Bernard
- 👤 Cleaver Arthur Valentine
- 👤 Dove Ernest Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:55
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/56; F02K9/58; F02K9/50; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7728; Y10T137/7758; Y10T137/7762
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2225916A
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US670563A
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US1162383A
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US2192042A
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US2370110A
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US2398201A
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US2384669A
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US2406926A
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US2505798A
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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) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |