US2641682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating unit
Assignee: Kennametal Inc
•
Filing: 1949-04-04
•
Granted: 1953-06-09
•
Expires: 1969-04-04
Abstract
No abstract record available.
Inventors
- 👤 Philip M Mckenna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:56
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/362
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US905557A
Cited
US1246165A
Cited
US1322416A
Cited
US1551766A
Cited
US1910532A
Cited
US2015536A
Cited
US2023413A
Cited
GB406633A
Cited
US1982857A
Cited
US1997741A
Cited
US2206792A
Cited
US2181899A
Cited
US2294413A
Cited
US2295777A
Cited
US2439570A
Cited
US2412373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |