US3146336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for heat treating metal
Assignee: JOSEPH E HARLING
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Filing: 1962-11-15
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Granted: 1964-08-25
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Expires: 1982-11-15
Abstract
No abstract record available.
Inventors
- 👤 Donald P Whitacre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:09
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D1/38; B; B23; B23K; B23K10/00; B23K7/00; B23K7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN APPARATUS FOR CLEANSING THE SURFACE OF ELONGATED CONDUCTIVE STOCK WHEREIN AN ELECTRODE THROUGH WHICH SAID STOCK MOVES IS PROVIDED FOR ESTABLISHING A PLASMA ARC THEREBETWEEN BY APPLICATION OF POTENTIAL TO SAID ELECTRODE AND TO A CURRENT PICK OFF ELECTRODE POSITIONED AT SAID CONDUCTIVE STOCK SPACED FROM THE POSITION OF SAID ELECTRODE, THE IMPROVEMENT IN SAID APPARATUS FOR CONTROLLING THE HEAT TREATMENT OF SAID STOCK COMPRISING MEANS FOR ADJUSTING THE RELATIVE SPACING OF SAID ELECTRODE AND SAID PICKOFF ELECTRODE TO ONE ANOTHER TO ADJUST THE ELECTRICAL CURRENT FLOW PATH LENGTH THROUGH SAID STOCK TO THEREBY CONTROL THE HEAT TREATMENT OF SAID STOCK.
Claim 2
Dependent Claim
102 words
IN APPARATUS FOR CLEANSING THE SURFACE OF ELONGATED CONDUCTIVE STOCK WHEREIN AN ELECTRODE THROUGH WHICH SAID STOCK MOVES IS PROVIDED FOR ESTABLISHING A PLASMA ARC THEREBETWEEN BY APPLICATION OF POTENTIAL TO SAID ELECTRODE AND TO A CURRENT PICK OFF ELECTRODE POSITIONED AT SAID CONDUCTIVE STOCK SPACED FROM THE POSITION OF SAID ELECTRODE, THE IMPROVEMENT IN SAID APPARATUS FOR CONTROLLING THE HEAT TREATMENT OF SAID STOCK COMPRISING MEANS FOR ADJUSTING THE RELATIVE SPACING OF SAID ELECTRODE AND SAID PICKOFF ELECTRODE TO ONE ANOTHER TO ADJUST THE ELECTRICAL CURRENT FLOW PATH LENGTH THROUGH SAID STOCK TO THEREBY CONTROL THE HEAT TREATMENT OF SAID STOCK.
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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |