US3455376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Compagnie Francaise Thomson Houston SA
•
Filing: 1967-08-22
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Granted: 1969-07-15
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Expires: 1987-08-22
Abstract
No abstract record available.
Inventors
- 👤 Charles A Beurtheret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:22
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28F; F28F13/00; F28F13/18; F28F13/185; F28F13/187; G; G21; G21C; G21C15/00; G21C15/02; G21C17/00; G21C17/02; G21C17/038; H; H01; H01J; H01J19/00; H01J19/28; H01J19/32; H01J19/36; F28D21/00; F28D2021/0019; F28D2021/0028; F28D2021/0029; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S165/00; Y10S165/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2098380A
Cited
US2863078A
Cited
US2969957A
Cited
US3046429A
Cited
US3235004A
Cited
FR1349387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |