US2612019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellent injection system with safety valve to cut off fluid pressure supply
Assignee: Bristol Siddeley Engines Ltd
•
Filing: 1949-12-27
•
Granted: 1952-09-30
•
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 16:30
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2225916A
Cited
US670563A
Cited
US1162383A
Cited
US2192042A
Cited
US2370110A
Cited
US2398201A
Cited
US2384669A
Cited
US2406926A
Cited
US2505798A
Cited
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 |