US2551757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency heating
Assignee: Individual
•
Filing: 1945-08-10
•
Granted: 1951-05-08
•
Expires: 1965-08-10
Abstract
No abstract record available.
Inventors
- 👤 Mittelmann Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:29
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/48; H05B6/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2324525A
Cited
US2147689A
Cited
US2251277A
Cited
US2252941A
Cited
US2333412A
Cited
US2358454A
Cited
US2376667A
Cited
US2416172A
Cited
US2448541A
Cited
US2396004A
Cited
US2473188A
Cited
US2467285A
Cited
US2470443A
Cited
US2415799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |