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US2677532A
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US
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Tangentially finned heat exchange tube
Assignee: Individual
•
Filing: 1950-04-06
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Granted: 1954-05-04
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Expires: 1970-04-06
Abstract
No abstract record available.
Inventors
- 👤 Huet Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:17
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/20; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/442; Y10S165/452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US767187A
Cited
US1757621A
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US1884777A
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CH166907A
Cited
FR827519A
Cited
US2167333A
Cited
US2277921A
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US2444908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |