Patent US2397208A successfully refreshed from Google Patents.
US2397208A
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US
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Waste heat utilizer
Assignee: Maxim Silencer Co
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Filing: 1941-02-21
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Granted: 1946-03-26
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Expires: 1961-02-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Felix Saco
- 👤 William R Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:13
CPC Classifications
F; F02; F02G; F02G5/00; F02G5/02; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1807; Y; Y02; Y02E; Y02E20/00; Y02E20/30; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/405; Y10S165/407; Y10S165/409; Y10S165/909
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) | 1949-03-25 | 1949-09-24 | 1950-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-03-25 | 1953-09-24 | 1954-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-03-25 | 1957-09-24 | 1958-03-26 | $7700.00 | Window Closed / Lapsed |