Patent US2386188A successfully refreshed from Google Patents.
US2386188A
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US
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Heat exchange apparatus
Assignee: Foster Wheeler Inc
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Filing: 1942-03-04
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Granted: 1945-10-09
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Expires: 1962-03-04
Abstract
No abstract record available.
Inventors
- 👤 Nicholas C Artsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:49
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1653; F28D7/1661; Y; Y10; Y10S; Y10S122/00; Y10S122/01; Y10S165/00; Y10S165/092; Y10S165/109
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) | 1948-10-08 | 1949-04-09 | 1949-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-10-08 | 1953-04-09 | 1953-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-10-08 | 1957-04-09 | 1957-10-09 | $7700.00 | Window Closed / Lapsed |