US2279511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel furnace
Assignee: Individual
•
Filing: 1939-09-01
•
Granted: 1942-04-14
•
Expires: 1959-09-01
Abstract
No abstract record available.
Inventors
- 👤 Gottignies Rodolphe
- 👤 Gottignies Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:11
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0036; F27B; F27B9/00; F27B9/02; F27B9/021; F27B9/06; F27B9/062; F27B9/063; F27B9/14; F27B9/20; F27B9/26; F27D5/00; F27D5/0006; F27D5/0012; F27D3/00; F27D3/12; F27D2003/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-04-13 | 1945-10-13 | 1946-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-13 | 1949-10-13 | 1950-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-13 | 1953-10-13 | 1954-04-14 | $7700.00 | Window Closed / Lapsed |