Patent US3947296A successfully refreshed from Google Patents.
US3947296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing steel sheet of cube-on-face texture having improved magnetic characteristics
Assignee: Nippon Steel Corp
•
Filing: 1973-12-14
•
Granted: 1976-03-30
•
Expires: 1993-12-14
Abstract
Abstract A process for producing an electrical steel sheet composed of cubic-on-face texture which comprises subjecting hot rolled steel sheet to primary cold rolling with a grooved roll then to a secondary cold rolling with smooth rolls, further to decarburization annealing and final finishing annealing.
Inventors
- 👤 Masuji Kumazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:31
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/22; B21B1/227; C; C21; C21D; C21D8/00; C21D8/12; C21D8/1216; C21D8/1233; B21B27/00; B21B27/005; C21D8/1277
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
A process for producing electrical sheet steel having cubic-on-face texture comprising the steps of: initially subjecting hot rolled steel sheet to primary cold rolling with a reduction of not less than 20% utilizing a roller having a grooved surface thereon, subsequently subjecting said steel sheet to secondary cold rolling utilizing a roller having a smooth surface thereon, subjecting said sheet to decarburization annealing and thereafter subjecting said sheet to final, finishing, recrystallization annealing.
Claim 2
Dependent Claim
73 words
A process for producing electrical sheet steel having cubic-on-face texture comprising the steps of: initially subjecting hot rolled steel sheet to primary cold rolling with a reduction of not less than 20% utilizing a roller having a grooved surface thereon, subsequently subjecting said steel sheet to secondary cold rolling utilizing a roller having a smooth surface thereon, subjecting said sheet to decarburization annealing and thereafter subjecting said sheet to final, finishing, recrystallization annealing.
Claim 3
Dependent Claim
20 words
A process according to claim 1 wherein said hot rolled steel sheet is annealed prior to said primary cold rolling.
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) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |