Patent US2912749A successfully refreshed from Google Patents.
US2912749A
Expired / Lapsed
US
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Method of making a heat exchanger
Assignee: Modine Manufacturing Co
•
Filing: 1956-01-13
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Granted: 1959-11-17
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Expires: 1976-01-13
Abstract
No abstract record available.
Inventors
- 👤 Norman G Bauernfeind
- 👤 Homer D Huggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:33
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; F; F28; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0391; F28D9/00; F28D9/0031; F28D9/0037; F28F; F28F3/00; F28F3/02; F28F3/025; F28F2275/00; F28F2275/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366
Claims Analysis
Total Claims: 0
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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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |