US2538979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction furnace
Assignee: APPLIC ELECTRO THERMIQUES SOC
•
Filing: 1947-08-07
•
Granted: 1951-01-23
•
Expires: 1967-08-07
Abstract
No abstract record available.
Inventors
- 👤 Parage Maurice Augustin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:28
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1645074A
Cited
US1235630A
Cited
US1599161A
Cited
US1595968A
Cited
US1694792A
Cited
US1694791A
Cited
US1837031A
Cited
US1805469A
Cited
US1756457A
Cited
US1878532A
Cited
US1838527A
Cited
US1824618A
Cited
US1863185A
Cited
US2019112A
Cited
US2063401A
Cited
GB454754A
Cited
US2101675A
Cited
US2280571A
Cited
US2286024A
Cited
FR880749A
Cited
CH224499A
Cited
FR881756A
Cited
CH226112A
Cited
US2375049A
Cited
US2381523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |