Patent US2262158A successfully refreshed from Google Patents.
US2262158A
Expired / Lapsed
US
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Heat exchanger
Assignee: Bryant Heater and Manufacturing Co
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Filing: 1939-08-01
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Granted: 1941-11-11
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Expires: 1959-08-01
Abstract
No abstract record available.
Inventors
- 👤 Vilynn O Beam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:28
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/02; F28F1/025; F28D; F28D7/00; F28D7/16; F28D7/1615; F28D7/1684
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-11-10 | 1945-05-12 | 1945-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-11-10 | 1949-05-12 | 1949-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-11-10 | 1953-05-12 | 1953-11-11 | $7700.00 | Window Closed / Lapsed |