Patent US2843514A successfully refreshed from Google Patents.
US2843514A
Expired / Lapsed
US
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Method and apparatus for heat treating metal stock
Assignee: American Brass Co
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Filing: 1956-06-29
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Granted: 1958-07-15
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Expires: 1976-06-29
Abstract
No abstract record available.
Inventors
- 👤 Jr John Henry Kunz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:15
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/84; Y; Y10; Y10S; Y10S165/00; Y10S165/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN THE HEAT-TREATMENT OF METAL STOCK IN A BELL FURNACE HAVING A MOTOR-DRIVEN FAN FOR PROVIDING FORCED CONVECTION CURRENTS WITHIN THE BELL AND AROUND THE STOCK AS IT IS HEATED AND SUBSEQUENTLY COOLED, THE IMPROVEMENT IN COOLING THE HEAT-TREATED STOCK WHICH COMPRISES DIRECTING A SPRAY OF WATER AGAINST THE ROTATING BLADES OF THE FAN, CONTINUOUSLY INTRODUCING WITHIN THE BELL A STREAM OF INERT GAS WHILE SIMULTANEOUSLY EXHAUSTING FROM WITHIN THE BELL SAID GAS TOGETHER WITH WATER VAPOR FORMED BY VAPORIZATION OF THE WATER SPRAY, AND DISCONTINUING SAID WATER SPRAY WHEN THE TEMPRATURE OF THE METAL STOCK HAS BEEN LOWERED TO WITHIN THE RANGE OF ABOUT 110*C. AND ABOUT 125*C. WHILE CONTINUING SAID INTRODUCTION AND EXHAUSTION OF SAID GAS UNTIL SUBSTANTIALLY ALL WATER VAPOR WITHIN THE BELL HAS BEEN EXHAUSTED.
Claim 2
Dependent Claim
129 words
IN THE HEAT-TREATMENT OF METAL STOCK IN A BELL FURNACE HAVING A MOTOR-DRIVEN FAN FOR PROVIDING FORCED CONVECTION CURRENTS WITHIN THE BELL AND AROUND THE STOCK AS IT IS HEATED AND SUBSEQUENTLY COOLED, THE IMPROVEMENT IN COOLING THE HEAT-TREATED STOCK WHICH COMPRISES DIRECTING A SPRAY OF WATER AGAINST THE ROTATING BLADES OF THE FAN, CONTINUOUSLY INTRODUCING WITHIN THE BELL A STREAM OF INERT GAS WHILE SIMULTANEOUSLY EXHAUSTING FROM WITHIN THE BELL SAID GAS TOGETHER WITH WATER VAPOR FORMED BY VAPORIZATION OF THE WATER SPRAY, AND DISCONTINUING SAID WATER SPRAY WHEN THE TEMPRATURE OF THE METAL STOCK HAS BEEN LOWERED TO WITHIN THE RANGE OF ABOUT 110*C. AND ABOUT 125*C. WHILE CONTINUING SAID INTRODUCTION AND EXHAUSTION OF SAID GAS UNTIL SUBSTANTIALLY ALL WATER VAPOR WITHIN THE BELL HAS BEEN EXHAUSTED.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |