US2990819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder head construction for internal combustion engines
Assignee: Motors Liquidation Co
•
Filing: 1958-05-14
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Granted: 1961-07-04
•
Expires: 1978-05-14
Abstract
No abstract record available.
Inventors
- 👤 Christiaan H Bouvy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:37
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/36; F02F1/38; F02B; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/20; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02F2001/244; F02F2001/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2102662A
Cited
US2070806A
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US2182990A
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US2533442A
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US2700969A
Cited
US2700964A
Cited
US2607331A
Cited
US2722202A
Cited
US2789553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |