Patent US3053512A successfully refreshed from Google Patents.
US3053512A
Expired / Lapsed
US
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Heat exchanger
Assignee: Pechiney SA
•
Filing: 1959-04-03
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Granted: 1962-09-11
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Expires: 1979-04-03
Abstract
No abstract record available.
Inventors
- 👤 Soudan Paul
- 👤 Mercier Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:39
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1669; F28D7/005; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/063; Y10S165/065; Y10S165/066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1308486A
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US1028777A
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US1884777A
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US1884778A
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US2506120A
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US2621900A
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US2640686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |