US3188245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge heat treatment of metals in electrolytes
Assignee: Individual
•
Filing: 1963-01-02
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Granted: 1965-06-08
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Expires: 1983-01-02
Abstract
No abstract record available.
Inventors
- 👤 Inoue Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:15
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D1/38; A; A61; A61L; A61L2/00; A61L2/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A METHOD OF HEAT TREATING A METAL WORK PIECE COMPRISINGS IMMERSING THE WORK PIECE IN AN ELECTROLYTE; PASSING ELECTRIC CURRENT THROUGH THE ELECTROLYTE WITH THE IMMERSED WORK PIECE CONNECTED AS AN ELECTRODE, AT SUFFICIENT VOLTAGE AND FOR A SUFFICIENT TIME PERIOD TO INTIALLY GENERATE A GASEOUS FILM AT THE WORK PIECE SURFACE AND THEN PRODUCE A GASEOUS-ELECTRIC HEATING DISCHARGE THROUGH SAID FILM FOR HEATING THE WORK PIECE; AND FINALLY PROGRESSIVELY WITHDRAWING THE HEATED WORK PIECE FROM SAID ELECTROLYTE WHILE SIMULTANEOUSLY AND PROGRESSIVELY IMMERSING SAID WORK PIECE IN AN INSULATING LIQUID FOR COOLING PURPOSES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |