US4615385B1
Expired / Lapsed
US
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Heat exchanger
Assignee: Modine Manufacturing Co
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Filing: 1985-04-12
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Granted: 1994-12-20
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Expires: 2005-04-12
Abstract
Abstract Improved resistance to pressure caused deformation in header and tank construction utilized in heat exchangers is achieved by providing domes, preferably exteriorally convex, in the header surfaces of the header and tank construction in the area between the holes in such constructions through which tubes extend.
Inventors
- 👤 Zalman P Saperstein
- 👤 Russell C Awe
- 👤 Norman F Costello
- 👤 Scott R Larrabee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:18
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0243; F28F2225/00; F28F2225/08; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/485; Y10S165/906
Claims Analysis
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References Cited (Backward Citations)
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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) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |