Patent US2948274A successfully refreshed from Google Patents.
US2948274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for modifying the operating characteristics of internal combustion engines
Assignee: Individual
•
Filing: 1958-05-21
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Granted: 1960-08-09
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Expires: 1978-05-21
Abstract
No abstract record available.
Inventors
- 👤 Wood George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:32
CPC Classifications
F; F02; F02D; F02D13/00; F02D13/02; F02D13/06; F01; F01L; F01L13/00; F01L13/0015; F01L2013/0089; F01L2013/0094; F01L2820/00; F01L2820/03; F01L2820/031; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |