The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 1990
Filed:
Apr. 12, 1989
Michel Douchy, Solesmes, FR;
Affival, , FR;
Abstract
The method concerns the desulphurization of cast iron produced by a blast furnace, before it is converted to steel. In a first phase of the process the cast iron is treated with a desulphurizing compound such as Na.sub.2 CO.sub.3. A very long composite product with a tubular skin is then added to the cast iron. The product comprises an axial zone containing magnesium in powdered or granular form, and an annular zone, separated from the axial zone by an intermediate wall and containing a powdered or granular material. An inert gas could then be injected and a clearing operation carried out.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile