Patent US2611587A successfully refreshed from Google Patents.
US2611587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: HEAT X CHANGER CO Inc
•
Filing: 1950-07-27
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Granted: 1952-09-23
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Expires: 1970-07-27
Abstract
No abstract record available.
Inventors
- 👤 Boling Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:50
CPC Classifications
F; F25; F25B; F25B40/00; F25B39/00; F25B39/02; F25B2339/00; F25B2339/04; F25B2339/047; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49359
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US660202A
Cited
US890526A
Cited
US907084A
Cited
US1584772A
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US1585671A
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US1794692A
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US2003122A
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US2117830A
Cited
US2085677A
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US2206826A
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US2415865A
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US2534031A
Cited
US2589262A
Cited
US2526032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |