Patent US2634958A successfully refreshed from Google Patents.
US2634958A
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Heat exchanger
Assignee: Modine Manufacturing Co
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Filing: 1948-12-03
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Granted: 1953-04-14
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Expires: 1968-12-03
Abstract
No abstract record available.
Inventors
- 👤 Clyde S Simpelaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:03
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/58; F04D29/582; F04D29/5826; F28; F28D; F28D9/00; F28D9/0062; F28F; F28F1/00; F28F1/02; F28F1/04; F28F1/045; F28F1/10; F28F1/12; F28F1/14; F28F1/16; F28F1/18; F28F13/00; F28F13/06; F28F3/00; F28F3/12; F28F2250/00; F28F2250/04; F28F2250/10; F28F2250/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1534A
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US213635A
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US837146A
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US871308A
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US940244A
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US1065837A
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US1313730A
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GB159933A
Cited
US1775819A
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US2380002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |