US3438430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double wall heat exchanger utilizing flexible conductor plates between the walls
Assignee: European Atomic Energy Community Euratom
•
Filing: 1966-08-25
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Granted: 1969-04-15
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Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 Lucien Kestemont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:07
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/16; G21C3/20; F; F22; F22B; F22B1/00; F22B1/02; F22B1/06; F22B1/063; F22B1/066; F28; F28F; F28F1/00; F28F1/003; F28F9/00; F28F9/005; F28F9/007; F16; F16L; F16L2101/00; F16L2101/30; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3071527A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |