Patent US2441279A successfully refreshed from Google Patents.
US2441279A
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Heat exchange method and apparatus
Assignee: Stewart Warner Corp
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Filing: 1942-06-12
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Granted: 1948-05-11
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Expires: 1962-06-12
Abstract
No abstract record available.
Inventors
- 👤 Mccollum Thelma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:30
CPC Classifications
B; B64; B64D; B64D13/00; F; F25; F25B; F25B23/00; Y; Y10; Y10S; Y10S62/00; Y10S62/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1821920A
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FR754609A
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US1580177A
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US1781062A
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US1965733A
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US1906370A
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US2101782A
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US2214053A
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US2325036A
Cited
US2310711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |