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Patent US2434976A successfully refreshed from Google Patents.
US2434976A
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Apparatus for effecting heat exchange between a gas and a liquid
Assignee: Permanente Metals Corp
•
Filing: 1944-10-02
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Granted: 1948-01-27
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Expires: 1964-10-02
Abstract
No abstract record available.
Inventors
- 👤 Woodward Teynham
- 👤 Arthur W Vettel
- 👤 Henry F Scandrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:08
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06; C; C01; C01F; C01F5/00; C01F5/14; C01F5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1098190A
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US1236581A
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US1639709A
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US1938247A
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US1939949A
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US2070067A
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US2273178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-26 | 1951-07-28 | 1952-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-26 | 1955-07-28 | 1956-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-26 | 1959-07-28 | 1960-01-27 | $7700.00 | Window Closed / Lapsed |