US3139358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing ribbing and roping
Assignee: Allegheny Ludlum Steel Corp
•
Filing: 1961-06-14
•
Granted: 1964-06-30
•
Expires: 1981-06-14
Abstract
No abstract record available.
Inventors
- 👤 Anthony F Graziano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:35
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
THE PROCESS OF PRODUCING RIB- AND ROPE-FREE FERRITIC STAINLESS STEEL STRIP HAVING A COMPOSITION WHICH INCLUDES FROM ABOUT 12% TO ABOUT 22% CHROMIUM, UP TO ABOUT .12% MAXIMUM CARBON, AND THE BALANCE SUBSTANTIALLY IRON WITH INCIDENTAL IMPURITIES, WHICH COMPRISES, HOT ROLLING SLABS OF SAID STEEL HAVING A THICKNESS WITHIN THE RANGE BETWEEN 2 INCHES AND 12 INCHES AND A TEMPERATURE WITHIN THE RANGE BETWEEN ABOUT 2400*F. AND ABOUT 1600*F. TO A HOT ROLLED AND HAVING A THICKNESS WITHIN THE RANGE BETWEEN ABOUT 0.10 INCH AND ABOUT 0.25 INCH, COLD ROLLING THE HOT ROLLED BAND TO EFFECT AT LEAST A 40% REDUCTION IN THE CROSS SECTIONAL AREA THEREOF, HEAT TREATING THE HOT AND COLD ROLLED BAND AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 1750*F. TO ABOUT 2000*F. TO RECRYSTALLIZE THE STEEL, AND COLD ROLLING SAID STEEL TO FINISH GAUGE.
Claim 2
Dependent Claim
140 words
THE PROCESS OF PRODUCING RIB- AND ROPE-FREE FERRITIC STAINLESS STEEL STRIP HAVING A COMPOSITION WHICH INCLUDES FROM ABOUT 12% TO ABOUT 22% CHROMIUM, UP TO ABOUT .12% MAXIMUM CARBON, AND THE BALANCE SUBSTANTIALLY IRON WITH INCIDENTAL IMPURITIES, WHICH COMPRISES, HOT ROLLING SLABS OF SAID STEEL HAVING A THICKNESS WITHIN THE RANGE BETWEEN 2 INCHES AND 12 INCHES AND A TEMPERATURE WITHIN THE RANGE BETWEEN ABOUT 2400*F. AND ABOUT 1600*F. TO A HOT ROLLED AND HAVING A THICKNESS WITHIN THE RANGE BETWEEN ABOUT 0.10 INCH AND ABOUT 0.25 INCH, COLD ROLLING THE HOT ROLLED BAND TO EFFECT AT LEAST A 40% REDUCTION IN THE CROSS SECTIONAL AREA THEREOF, HEAT TREATING THE HOT AND COLD ROLLED BAND AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 1750*F. TO ABOUT 2000*F. TO RECRYSTALLIZE THE STEEL, AND COLD ROLLING SAID STEEL TO FINISH GAUGE.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |