US3009690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of heat from the fumes of industrial furnaces
Assignee: Individual
•
Filing: 1958-01-10
•
Granted: 1961-11-21
•
Expires: 1978-01-10
Abstract
No abstract record available.
Inventors
- 👤 Brichard Edgard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:01
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/04; F; F28; F28D; F28D17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US311190A
Cited
US1849657A
Cited
US2420373A
Cited
US2768822A
Cited
US2813708A
Cited
US2797910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |