Patent US2474420A successfully refreshed from Google Patents.
US2474420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency dielectric heating apparatus
Assignee: ROSS M CARRELL
•
Filing: 1945-07-16
•
Granted: 1949-06-28
•
Expires: 1965-07-16
Abstract
No abstract record available.
Inventors
- 👤 Loran B Himmel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:02
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/48; H05B6/50; H05B6/62
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1900573A
Cited
US1972050A
Cited
US2112418A
Cited
US2149387A
Cited
US2179261A
Cited
US2276994A
Cited
US2229205A
Cited
US2304958A
Cited
US2298038A
Cited
US2397615A
Cited
US2382435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |