US2759085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heating a workpiece by high-frequency currents
Assignee: Hartford National Bank and Trust Co
•
Filing: 1953-07-23
•
Granted: 1956-08-14
•
Expires: 1973-07-23
Abstract
No abstract record available.
Inventors
- 👤 Dirk Christiaan Van Iperen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:34
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/362
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A METHOD OF HEATING A WORKPIECE BY HIGH-FREQUENCY CURRENTS BY MEANS OF A COIL-WOUND WIRE INDUCTOR HAVING AN ASSOCIATED CORE COMPRISING THE STEPS OF EXTERNALLY WETTING SAID INDUCTOR AND CORE BY MEANS OF A LIQUID COOL-
Claim 2
Independent Claim
36 words
A METHOD OF HEATING A WORKPIECE BY HIGH-FREQUENCY CURRENTS BY MEANS OF A COIL-WOUND WIRE INDUCTOR HAVING AN ASSOCIATED CORE COMPRISING THE STEPS OF EXTERNALLY WETTING SAID INDUCTOR AND CORE BY MEANS OF A LIQUID COOL-
References Cited (Backward Citations)
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US2395196A
Cited
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Cited
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US2632841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |