US2571218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical furnace
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1946-08-13
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Granted: 1951-10-16
•
Expires: 1966-08-13
Abstract
No abstract record available.
Inventors
- 👤 Buttero Enzo Del
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:51
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/84; A; A47; A47J; A47J37/00; A47J37/04; A47J37/041; F; F24; F24C; F24C15/00; F24C15/16; F24C7/00; H05B2203/00; H05B2203/017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AU101011B
Cited
GB263745A
Cited
US1631655A
Cited
US1851994A
Cited
US1840698A
Cited
US2119680A
Cited
US2031995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-15 | 1955-04-16 | 1955-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-15 | 1959-04-16 | 1959-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-15 | 1963-04-16 | 1963-10-16 | $7700.00 | Window Closed / Lapsed |