US3422803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine construction and method for operation with lean air-fuel mixtures
Assignee: Motors Liquidation Co
•
Filing: 1967-06-07
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Granted: 1969-01-21
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Expires: 1987-06-07
Abstract
No abstract record available.
Inventors
- 👤 Donald L Stivender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:36
CPC Classifications
F; F01; F01L; F01L13/00; F01L13/0015; F01L13/0021; F02; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1701391A
Cited
US2014659A
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US3146766A
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US3157166A
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US3145696A
Cited
US3189011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |