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(12) Patent: | (11) CA 2073131 |
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(54) English Title: | IMPROVED DRAWING-QUALITY STEEL, PROCESS FOR MAKING SHEET METAL FOR DRAWING AND SHEET METAL THEREOF |
(54) French Title: | ACIER A EMBOUTISSAGE AMELIORE, PROCEDE DE FABRICATION DE TOLES MINCES DESTINEES A L'EMBOUTISSAGE ET TOLE MINCE OBTENUE |
Status: | Deemed expired |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | NORTON ROSE FULBRIGHT CANADA LLP/S.E.N.C.R.L., S.R.L. |
(74) Associate agent: | |
(45) Issued: | 2003-04-29 |
(22) Filed Date: | 1992-07-03 |
(41) Open to Public Inspection: | 1993-01-05 |
Examination requested: | 1999-01-13 |
Availability of licence: | N/A |
(25) Language of filing: | French |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | ||||||
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L'acier à emboutissabilité améliorée est
caractérisé en ce qu'il contient du carbone dans use
proportion inférieure à 0,015 %, du manganèse dans une
proportion de 0,15 à 0,25 % du soufre dans une proportion
inférieure à 0,012 % et de l'aluminium dans une
proportion inférieure à 0,014 %.
Cet acier est destiné à la fabrication de tôles
minces destinées à l'emboutissage, selon un procédé
comportant notamment les opérations suivantes :
- élaboration en convertisseur d'un acier ayant la
composition ci-dessus ;
- laminage à chaud entièrement en domaine
austénitique ;
- bobinage à une température supérieure à 650°C
- recuit continu, après laminage à froid, à une
température inférieure à 700°C.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
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Title | Date |
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Forecasted Issue Date | 2003-04-29 |
(22) Filed | 1992-07-03 |
(41) Open to Public Inspection | 1993-01-05 |
Examination Requested | 1999-01-13 |
(45) Issued | 2003-04-29 |
Deemed Expired | 2006-07-04 |
There is no abandonment history.
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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SOLLAC |
Past Owners on Record |
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LAFONTAINE, DANIEL |
VAN HOECKE, GEORGES |
ZIMMER, PATRICK |