US2991780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chambers for internal combustion engines
Assignee: Motors Liquidation Co
•
Filing: 1959-12-09
•
Granted: 1961-07-11
•
Expires: 1979-12-09
Abstract
No abstract record available.
Inventors
- 👤 Wayne V Brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:01
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/08; F02B2275/00; F02B2275/34; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2347097A
Cited
US2617400A
Cited
US2736306A
Cited
US2803228A
Cited
US2718221A
Cited
US2800123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |