US2974404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger matrix
Assignee: Ford Motor Co
•
Filing: 1956-04-02
•
Granted: 1961-03-14
•
Expires: 1976-04-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Michael Humenik
- 👤 Niranjan M Parikh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:06
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/006; F28D; F28D19/00; F28D19/04; F28F21/04; F28F2275/00; F28F2275/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49357
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2139431A
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US2395442A
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US2433546A
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US2490776A
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US2671746A
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US2668923A
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US2709147A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |