US2855909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable temperature system
Assignee: Ford Motor Co
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Filing: 1955-09-12
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Granted: 1958-10-14
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Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 John P Stefan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:00
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/02; F01P7/04; F01P7/042; F01P5/00; F01P5/10; F01P5/12; F01P11/00; F01P11/02; F01P11/028; F01P2037/00; F01P2037/02
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) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |