US2884913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Individual
•
Filing: 1958-03-14
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Granted: 1959-05-05
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Expires: 1978-03-14
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Heintz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:29
CPC Classifications
F; F02; F02B; F02B3/00; F02B19/00; F02B19/10; F02B19/1004; F02B19/1019; F02B19/1023; F02B19/1028; F02B19/1052; F02D; F02D9/00; F02B2720/00; F02B2720/22; F02B2720/226; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0261; F02D2700/0266; 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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |