US3067072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of annealing type 430 stainless steel
Assignee: Sharon Steel Corp
•
Filing: 1960-11-07
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Granted: 1962-12-04
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Expires: 1980-11-07
Abstract
No abstract record available.
Inventors
- 👤 Wallace B Leffingwell
- 👤 Henry G Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:54
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF MAKING HOT ROLLED ANNEALED TYPE 430 STAINLESS STEEL AT HOT ROLLING TEMPERATURE RANGE OF 2300* F. TO 1900*F. TO FORM HOT ROLLED, SOFT, DUCTILE, FULLY SPHEROIDIZED STRIP THAT IS COMPLETELY FREE OF MARTENSITE; FURNACE COOLING THE HOT ROLLED STRIP FROM THE HOT ROLLING TEMPERATURE RANGE IMMEDIATELY AFTER HOT ROLLING AND WHILE STILL RETAINING HOT ROLLING HEAT TO A TEMPERATURE IN THE RANGE OF 1400*F. TO 1500*F., MAINTAINING THE STRIP AT SAID 1400*F. TO 1500*F. TEMPERATURE FOR AT LEAST THREE HOURS; AND THEN COOLING THE HOT ROLLED STRIP TO ROOM TEMPERATURE.
Claim 2
Independent Claim
93 words
THE METHOD OF MAKING HOT ROLLED ANNEALED TYPE 430 STAINLESS STEEL AT HOT ROLLING TEMPERATURE RANGE OF 2300* F. TO 1900*F. TO FORM HOT ROLLED, SOFT, DUCTILE, FULLY SPHEROIDIZED STRIP THAT IS COMPLETELY FREE OF MARTENSITE; FURNACE COOLING THE HOT ROLLED STRIP FROM THE HOT ROLLING TEMPERATURE RANGE IMMEDIATELY AFTER HOT ROLLING AND WHILE STILL RETAINING HOT ROLLING HEAT TO A TEMPERATURE IN THE RANGE OF 1400*F. TO 1500*F., MAINTAINING THE STRIP AT SAID 1400*F. TO 1500*F. TEMPERATURE FOR AT LEAST THREE HOURS; AND THEN COOLING THE HOT ROLLED STRIP TO ROOM TEMPERATURE.
References Cited (Backward Citations)
US2851384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |