US3021804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating heat exchangers
Assignee: Modine Manufacturing Co
•
Filing: 1955-02-18
•
Granted: 1962-02-20
•
Expires: 1975-02-18
Abstract
No abstract record available.
Inventors
- 👤 Clyde S Simpelaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0308; F28D1/0316; F28F1/00; F28F1/10; F28F1/12; F28F1/126; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |