Patent US2475604A successfully refreshed from Google Patents.
US2475604A
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US
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Heat exchange apparatus
Assignee: Foster Wheeler Inc
•
Filing: 1943-11-02
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Granted: 1949-07-12
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Expires: 1963-11-02
Abstract
No abstract record available.
Inventors
- 👤 Frisch Martin
- 👤 Blizard John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:32
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/30; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/507
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190503026A
Cited
FR574566A
Cited
US1893270A
Cited
GB331392A
Cited
US1916574A
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US1865051A
Cited
US2089340A
Cited
US1992646A
Cited
US2085041A
Cited
US2216778A
Cited
GB502579A
Cited
US2261136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |