Patent US2687626A successfully refreshed from Google Patents.
US2687626A
Expired / Lapsed
US
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Heat exchanger having open-sided bore superimposed on closed bore
Assignee: Bohn Aluminum and Brass Corp
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Filing: 1952-02-16
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Granted: 1954-08-31
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Expires: 1972-02-16
Abstract
No abstract record available.
Inventors
- 👤 Sterling S Bartlowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:01
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/06; F25D21/08; F25B; F25B2400/00; F25B2400/05; F25B2400/052; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/4935; Y10T29/49359; Y10T29/49396; Y10T29/49826; Y10T29/49863; Y10T29/49876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1779706A
Cited
US1908573A
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US1961070A
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US2024612A
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US2181856A
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US2190288A
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US2415243A
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US2410194A
Cited
US2471317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |