US3439657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling devices for supercharged internal combustion engines
Assignee: Individual
•
Filing: 1967-02-27
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Granted: 1969-04-22
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Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jean Louis Gratzmuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:01
CPC Classifications
F; F01; F01P; F01P3/00; F01P3/20; F02; F02B; F02B29/00; F02B29/04; F02B29/0406; F02B29/0412; F02B29/0425; F01P3/18; F01P2003/182; F01P2003/185; F01P2003/187; F01P2060/00; F01P2060/02; F01P2060/04; F02B3/00; F02B3/06; 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) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |