US2196229A
Expired / Lapsed
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Heat exchange system
Assignee: Houdry Process Corp
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Filing: 1937-03-03
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Granted: 1940-04-09
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Expires: 1957-03-03
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Prickett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:18
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/06; B01J8/067; B01J19/00; B01J19/0006; B01J19/0013; F; F28; F28D; F28D15/00; F28D15/02; F28D20/00; F28D20/0034; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/0007; B01J2208/00079; B01J2208/00088; B01J2208/00106; B01J2208/00115; B01J2208/00132; B01J2208/00141; B01J2208/00168; B01J2208/00256; B01J2208/0053; F28D21/00; F28D2021/0019; F28D2021/0022; Y; Y02; Y02E; Y02E60/00; Y02E60/14
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) | 1943-04-09 | 1943-10-09 | 1944-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-09 | 1947-10-09 | 1948-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-09 | 1951-10-09 | 1952-04-09 | $7700.00 | Window Closed / Lapsed |