Patent US2472413A successfully refreshed from Google Patents.
US2472413A
Expired / Lapsed
US
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Heat exchanger
Assignee: American Locomotive Co
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Filing: 1945-09-25
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Granted: 1949-06-07
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Expires: 1965-09-25
Abstract
No abstract record available.
Inventors
- 👤 John M Gantvoort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:50
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28D; F28D9/00; F28D9/0062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190226073A
Cited
US1208022A
Cited
US1546294A
Cited
US1680145A
Cited
FR609527A
Cited
US1692391A
Cited
US1804191A
Cited
GB488571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |