Patent US1988843A successfully refreshed from Google Patents.
US2305070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel-and-air control for internalcombustion engines
Assignee: Bristol Aeroplane Co Ltd
•
Filing: 1940-05-20
•
Granted: 1942-12-15
•
Expires: 1960-05-20
Abstract
No abstract record available.
Inventors
- 👤 Butler Leonard Frederic George
- 👤 Crowe Robert Kelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:35
CPC Classifications
F; F02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/022; F02D2700/0223; Y; Y10; Y10S; Y10S236/00; Y10S236/01; Y10S60/00; Y10S60/913; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/206
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-12-14 | 1946-06-15 | 1946-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-12-14 | 1950-06-15 | 1950-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-12-14 | 1954-06-15 | 1954-12-15 | $7700.00 | Window Closed / Lapsed |