US2416172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency induction heating system
Assignee: Westinghouse Electric Corp
•
Filing: 1943-04-27
•
Granted: 1947-02-18
•
Expires: 1963-04-27
Abstract
No abstract record available.
Inventors
- 👤 Luther W Gregory
- 👤 Ralph N Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:36
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1604981A
Cited
US1719521A
Cited
US1551822A
Cited
US1833617A
Cited
US2013806A
Cited
AU815432A
Cited
GB410182A
Cited
US2101715A
Cited
GB461289A
Cited
GB457381A
Cited
US2251277A
Cited
US2351604A
Cited
US2313440A
Cited
US2384799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-17 | 1950-08-19 | 1951-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-17 | 1954-08-19 | 1955-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-17 | 1958-08-19 | 1959-02-18 | $7700.00 | Window Closed / Lapsed |