US2673228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction furnace with high-temperature resistor
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1950-09-15
•
Granted: 1954-03-23
•
Expires: 1970-09-15
Abstract
No abstract record available.
Inventors
- 👤 Samuel S Kistler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:53
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/06; C; C01; C01B; C01B33/00; C01B33/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US652640A
Cited
US684296A
Cited
US775654A
Cited
US847003A
Cited
US1132684A
Cited
US1091808A
Cited
US1378189A
Cited
US1470195A
Cited
US1456891A
Cited
US1438936A
Cited
US1572881A
Cited
US1851984A
Cited
US1830481A
Cited
US1799102A
Cited
US2231723A
Cited
US2291532A
Cited
US2516570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |