US3055643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchangers
Assignee: Compagnie Francaise Thomson Houston SA
•
Filing: 1957-08-01
•
Granted: 1962-09-25
•
Expires: 1977-08-01
Abstract
No abstract record available.
Inventors
- 👤 Beurtheret Charles Alpho Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:25
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/74; Y; Y10; Y10S; Y10S165/00; Y10S165/183
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB219329A
Cited
GB330590A
Cited
US1952281A
Cited
GB486268A
Cited
US2279548A
Cited
US2440245A
Cited
US2474809A
Cited
US2873954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |