US2933894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel proportioning dual fuel system
Assignee: Rag All SpA
•
Filing: 1954-10-25
•
Granted: 1960-04-26
•
Expires: 1974-10-25
Abstract
No abstract record available.
Inventors
- 👤 Richard M Johnson
- 👤 Loft Arne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:12
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/40; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87861
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1833265A
Cited
US1954442A
Cited
US2395671A
Cited
US2569766A
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US2454222A
Cited
US2649107A
Cited
US2637334A
Cited
US2690167A
Cited
US2722199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |