US2545296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant frequency control for high-frequency heating apparatus
Assignee: Individual
•
Filing: 1946-02-20
•
Granted: 1951-03-13
•
Expires: 1966-02-20
Abstract
No abstract record available.
Inventors
- 👤 Mittelmann Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:43
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/04; H03; H03L; H03L7/00; H03L7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2441435A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |