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Patent US3034769A successfully refreshed from Google Patents.
US3034769A
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US
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Heat exchangers
Assignee: Bertin Technologies SAS
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Filing: 1957-10-18
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Granted: 1962-05-15
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Expires: 1977-10-18
Abstract
No abstract record available.
Inventors
- 👤 Bertin Jean Henri
- 👤 Salmon Benjamin Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:34
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/02; Y; Y10; Y10S; Y10S165/00; Y10S165/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1275366A
Cited
US1867716A
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US1841083A
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US1921927A
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US1919179A
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US2302513A
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US2668424A
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US2758822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |