US3201287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treating method
Assignee: Crucible Steel Company of America
•
Filing: 1960-06-10
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Granted: 1965-08-17
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Expires: 1980-06-10
Abstract
No abstract record available.
Inventors
- 👤 Flowers Ab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:33
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0247; C21D8/0252; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/573; C21D9/5735; C21D9/5737; C22; C22F; C22F1/00; C22F1/16; C22F1/18; C22F1/183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A METHOD OF PRODUCING STRIP HAVING A VARIATION FROM FLATNESS NOT EXCEEDING ABOUT 1% AND COMPRISING A HIGH STRENGTH METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND ALLOYS THEREOF COMPRISING CONTINUOUSLY MOVING SAID STRIP, HEATING SAID STRIP TO A TEMPERATURE OF BETWEEN ABOUT 1200*F. AND ABOUT 1750*F. IN A HEATING ZONE, APPLYING TENSION TO SAID STRIP LONGITUDINALLY THEREOF WHILE IN SAID HEATING ZONE, APPLYING OPPOSED COMPRESSIVE FORCES TO BOTH SIDES OF A TRANSVERSE PORTION OF THE STRIP EXTENDING FROM EDGE TO A EDGE THEREOF WHILE SAID STRIP IS IN SAID HEATING ZONE, QUENCHING SAID STRIP TO SUBSTANTIALLY ROOM TEMPERATURE BY PASSING SAID STRIP THROUGH A COOLING ZONE WHEREIN BOTH SIDES OF SAID STRIP ARE CONTACTED WITH A SOLID HEAT TRANSFER MEDIUM HAVING A HEAT CAPACITY SUFFICIENTLY GREAT SO AS TO SUBSTANTIALLY INSTANEOUSLY EXTRACT FROM SAID STRIP THE EXCESS HEAT CONTENT THEREOF, MAINTAINING THE ELEVATED TEMPERATURE OF THE STRIP SUBSTANTIALLY UNCHANGED UNTIL ENTRY OF THE STRIP INTO THE COOLING ZONE, AND APPLYING A COMPRESSIVE FORCE TO BOTH SIDES OF SAID STRIP THROUGHOUT THE COOLING ZONE.
Claim 2
Independent Claim
175 words
A METHOD OF PRODUCING STRIP HAVING A VARIATION FROM FLATNESS NOT EXCEEDING ABOUT 1% AND COMPRISING A HIGH STRENGTH METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND ALLOYS THEREOF COMPRISING CONTINUOUSLY MOVING SAID STRIP, HEATING SAID STRIP TO A TEMPERATURE OF BETWEEN ABOUT 1200*F. AND ABOUT 1750*F. IN A HEATING ZONE, APPLYING TENSION TO SAID STRIP LONGITUDINALLY THEREOF WHILE IN SAID HEATING ZONE, APPLYING OPPOSED COMPRESSIVE FORCES TO BOTH SIDES OF A TRANSVERSE PORTION OF THE STRIP EXTENDING FROM EDGE TO A EDGE THEREOF WHILE SAID STRIP IS IN SAID HEATING ZONE, QUENCHING SAID STRIP TO SUBSTANTIALLY ROOM TEMPERATURE BY PASSING SAID STRIP THROUGH A COOLING ZONE WHEREIN BOTH SIDES OF SAID STRIP ARE CONTACTED WITH A SOLID HEAT TRANSFER MEDIUM HAVING A HEAT CAPACITY SUFFICIENTLY GREAT SO AS TO SUBSTANTIALLY INSTANEOUSLY EXTRACT FROM SAID STRIP THE EXCESS HEAT CONTENT THEREOF, MAINTAINING THE ELEVATED TEMPERATURE OF THE STRIP SUBSTANTIALLY UNCHANGED UNTIL ENTRY OF THE STRIP INTO THE COOLING ZONE, AND APPLYING A COMPRESSIVE FORCE TO BOTH SIDES OF SAID STRIP THROUGHOUT THE COOLING ZONE.
References Cited (Backward Citations)
US1857670A
Cited
US2445866A
Cited
US2441500A
Cited
US2642764A
Cited
US2783788A
Cited
US2836527A
Cited
US3005737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |