US2454845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency oscillator circuit for induction heating apparatus
Assignee: Federal Telephone and Radio Corp
•
Filing: 1943-05-04
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Granted: 1948-11-30
•
Expires: 1963-05-04
Abstract
No abstract record available.
Inventors
- 👤 Vernon W Sherman
- 👤 Wheeler Carson Mckeag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2324525A
Cited
US2118414A
Cited
US2026874A
Cited
US2330582A
Cited
US2311631A
Cited
US2318061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |