Patent US2883974A successfully refreshed from Google Patents.
US2883974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engines
Assignee: Individual
•
Filing: 1955-12-02
•
Granted: 1959-04-28
•
Expires: 1975-12-02
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Heising
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:29
CPC Classifications
F; F02; F02D; F02D15/00; F02D15/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1227612A
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GB334616A
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US1925086A
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US2040652A
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US2042969A
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US2120012A
Cited
US2163015A
Cited
GB483298A
Cited
US2145017A
Cited
US2392829A
Cited
FR919092A
Cited
US2467568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |