US3446192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-cycle internal combustion engine
Assignee: Individual
•
Filing: 1967-09-05
•
Granted: 1969-05-27
•
Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 Mitchell J Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:33
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/12; F02B19/06; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE43788C
Cited
US1564009A
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US1521077A
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US1642655A
Cited
US1866774A
Cited
GB396794A
Cited
US2018944A
Cited
GB515107A
Cited
US2369738A
Cited
US2495978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |