US3431893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-tube forced-circulation heat transfer devices
Assignee: FIVES PENHOET
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Filing: 1966-11-08
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Granted: 1969-03-11
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Expires: 1986-11-08
Abstract
No abstract record available.
Inventors
- 👤 Lucien Frederic Henri M Fouche
- 👤 Marc Roger Armand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:49
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/0058; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1823; F28F; F28F9/00; F28F9/02; F28F9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |