Patent US3276920A successfully refreshed from Google Patents.
US3276920A
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Heat treatment
Assignee: Davy Loewy Ltd
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Filing: 1963-12-18
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Granted: 1966-10-04
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Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 Sims Raymond Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:13
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/525; C21D1/00; C21D1/34; C21D1/53; C21D1/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF HEAT TREATING STEEL ROD HAVING A CARBON CONTENT BETWEEN 0.40% AND 0.85% WHICH COMPRISES COILING THE HOT ROD ISSUING FROM A ROLLING MILL, BRINGING THE HOT COILS INTO HEAT EXCHANGE RELATIONSHIP WITH AN ENVIRONMENT OF FLUIDIZED PARTICULATE MATERIAL BEFORE THE ROD HAS COOLED BELOW ITS AUSTENITIC-FERRITE CHANGE POINT, CONTROLLING THE TEMPERATURE OF THE ENVIRONMENT TO FORM A FINE PEARLITIC STRUCTURE THROUGHOUT THE ROD, AND THEREAFTER REMOVING THE COIL FROM THE ENVIRONMENT.
Claim 2
Independent Claim
74 words
A METHOD OF HEAT TREATING STEEL ROD HAVING A CARBON CONTENT BETWEEN 0.40% AND 0.85% WHICH COMPRISES COILING THE HOT ROD ISSUING FROM A ROLLING MILL, BRINGING THE HOT COILS INTO HEAT EXCHANGE RELATIONSHIP WITH AN ENVIRONMENT OF FLUIDIZED PARTICULATE MATERIAL BEFORE THE ROD HAS COOLED BELOW ITS AUSTENITIC-FERRITE CHANGE POINT, CONTROLLING THE TEMPERATURE OF THE ENVIRONMENT TO FORM A FINE PEARLITIC STRUCTURE THROUGHOUT THE ROD, AND THEREAFTER REMOVING THE COIL FROM THE ENVIRONMENT.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |