US2936160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative heat exchanger, specifically air preheater
Assignee: Svenska Rotor Maskiner AB
•
Filing: 1953-04-17
•
Granted: 1960-05-10
•
Expires: 1973-04-17
Abstract
No abstract record available.
Inventors
- 👤 Nilsson Hans Robert
- 👤 Persson Walther Per Sigvard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:23
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/048; F16; F16C; F16C33/00; F16C33/30; F16C33/58; F16C33/60; F16C33/61; F16C19/00; F16C19/02; F16C19/14; F16C19/16; F16C19/163; F16C19/166; F16C2300/00; F16C2300/10; F16C2300/14; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1823481A
Cited
US2055071A
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US2010752A
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US2306189A
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US2465497A
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US2468419A
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US2598182A
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US2540733A
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US2605646A
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US2672378A
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US2545122A
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US2607565A
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US2744731A
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US2674898A
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US2803508A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |