US3459599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of thermomechanically annealing steel
Assignee: United States Steel Corp
•
Filing: 1966-10-17
•
Granted: 1969-08-05
•
Expires: 1986-10-17
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Grange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:31
CPC Classifications
B; B21; B21B; B21B45/00; B21B45/02; B21B45/0203; C; C21; C21D; C21D8/00; C21D8/02; C21D8/0221; C21D8/0226; C21D1/00; C21D1/26; C21D1/32; C21D1/78; C21D1/785
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A METHOD OF THERMOMECHANICALLY TREATING STEELS TO PROVIDE A PRODUCT HAVING A SPHEROIDIZED MICROSTRUCTURE, GOOD COLD FORMABILITY AND SATISFACTORY DUCTILITY, WHICH IS PARTICULARLY SUITABLE FOR HYPEREUTECTOID AND ALLOY STEELS COMPRISING DRASTICALLY DEFORMING SAID STEEL OVER A TEMPERATURE RANGE BEGINNING ABOVE THE A1 TEMPERATURE BUT NOT MORE THAN 150* F. ABOVE THE A1 TEMPERATURE AND FINISHING AT A TEMPERATURE BELOW THE A1 TEMPERATURE BUT NOT MORE THAN 50* F. BELOW THE A1 TEMPERATURE OF SAID STEEL TO A TOTAL REDUCTION IN AREA OF MORE THAN 50 PERCENT.
Claim 2
Independent Claim
86 words
A METHOD OF THERMOMECHANICALLY TREATING STEELS TO PROVIDE A PRODUCT HAVING A SPHEROIDIZED MICROSTRUCTURE, GOOD COLD FORMABILITY AND SATISFACTORY DUCTILITY, WHICH IS PARTICULARLY SUITABLE FOR HYPEREUTECTOID AND ALLOY STEELS COMPRISING DRASTICALLY DEFORMING SAID STEEL OVER A TEMPERATURE RANGE BEGINNING ABOVE THE A1 TEMPERATURE BUT NOT MORE THAN 150* F. ABOVE THE A1 TEMPERATURE AND FINISHING AT A TEMPERATURE BELOW THE A1 TEMPERATURE BUT NOT MORE THAN 50* F. BELOW THE A1 TEMPERATURE OF SAID STEEL TO A TOTAL REDUCTION IN AREA OF MORE THAN 50 PERCENT.
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) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |