Patent US1952040A successfully refreshed from Google Patents.
US2940435A
Expired / Lapsed
US
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Dual fuel system
Assignee: Individual
•
Filing: 1957-03-07
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Granted: 1960-06-14
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Expires: 1977-03-07
Abstract
No abstract record available.
Inventors
- 👤 Fred A Nemec
- 👤 Elwood C Martin
- 👤 Robert W Nemec
- 👤 Raymond E Nemec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:51
CPC Classifications
F; F02; F02D; F02D19/00; F02D19/06; F02D19/0602; F02D19/0613; F02D19/0621; F02D19/0639; F02D19/0649; F02D19/0657; F02D19/0663; F02D19/0673; F02D19/0676; F02D19/0684; F02D19/08; F02D19/081; F02D19/0665; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1105016A
Cited
US2758579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |