US3421490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine construction
Assignee: Continental Motors Corp
•
Filing: 1967-07-10
•
Granted: 1969-01-14
•
Expires: 1987-07-10
Abstract
No abstract record available.
Inventors
- 👤 William A Wiseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:42
CPC Classifications
F; F02; F02B; F02B37/00; F02B67/00; F02B67/04; F02B67/10; F02B75/00; F02B75/16; F02B75/18; F02B75/24; F02B75/243; F02F; F02F7/00; F02F7/0002; F02F7/0009; 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)
US1676418A
Cited
US2001866A
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US2021262A
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US2550696A
Cited
US2678037A
Cited
US3073291A
Cited
US2968293A
Cited
GB943293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |