Patent US2453718A successfully refreshed from Google Patents.
US2453718A
Expired / Lapsed
US
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Heat exchange apparatus
Assignee: STEARNS ROGER Manufacturing CO
•
Filing: 1942-07-20
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Granted: 1948-11-16
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Expires: 1962-07-20
Abstract
No abstract record available.
Inventors
- 👤 John E Mason
- 👤 White Clarence
- 👤 Virginia A White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:39
CPC Classifications
C; C13; C13B; C13B25/00; C13B25/006; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/0018; B01D9/0031; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/152
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US518618A
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DE111948C
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US759686A
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GB190412606A
Cited
FR348230A
Cited
US1903471A
Cited
US2011032A
Cited
US2135325A
Cited
CH189729A
Cited
US2160533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |