Patent US2828397A successfully refreshed from Google Patents.
US2828397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1954-10-28
•
Granted: 1958-03-25
•
Expires: 1974-10-28
Abstract
No abstract record available.
Inventors
- 👤 William A Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:43
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/365; C; C21; C21D; C21D9/00; C21D9/0068; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2238082A
Cited
US2182341A
Cited
US2599086A
Cited
US2543551A
Cited
US2655589A
Cited
US2717364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |