US3036818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: FOSTER WHEELER FRANCAISE SOC
•
Filing: 1959-01-29
•
Granted: 1962-05-29
•
Expires: 1979-01-29
Abstract
No abstract record available.
Inventors
- 👤 Legrand Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:22
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/26; F28D; F28D7/00; F28D7/06; F28F1/00; F28F1/10; F28F13/00; F28F13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189511959A
Cited
US1339385A
Cited
US1699542A
Cited
US1832423A
Cited
US2424221A
Cited
US2852042A
Cited
US2677394A
Cited
US2707098A
Cited
US2692763A
Cited
US2869836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |