US2374608A
Expired / Lapsed
US
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Heat transfer apparatus
Assignee: Individual
•
Filing: 1942-08-15
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Granted: 1945-04-24
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Expires: 1962-08-15
Abstract
No abstract record available.
Inventors
- 👤 Mccollum Thelma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:36
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08; F; F01; F01N; F01N5/00; F24; F24F; F24F2203/00; F24F2203/10; F24F2203/1004; F24F2203/104; F24F2203/1048; F24F2203/1052; F24F2203/1068; F24F2203/1084; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T50/00; Y02T50/50; Y10; Y10S; Y10S60/00; Y10S60/902
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) | 1948-04-23 | 1948-10-23 | 1949-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-23 | 1952-10-23 | 1953-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-23 | 1956-10-23 | 1957-04-24 | $7700.00 | Window Closed / Lapsed |