Patent US2458159A successfully refreshed from Google Patents.
US2458159A
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US
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Heat exchanger
Assignee: Westinghouse Electric Corp
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Filing: 1946-11-26
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Granted: 1949-01-04
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Expires: 1966-11-26
Abstract
No abstract record available.
Inventors
- 👤 George R Goldthwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:24
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0233; F28D1/024; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/06; Y10S165/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2295991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |