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:
Nov. 28, 2000
Filed:
Jun. 12, 1998
Kris Schmidt, Granada Hills, CA (US);
Charles W Hull, Santa Clarita, CA (US);
Paul F Jacobs, Saunderstown, RI (US);
3D Systems, Inc., Valencia, CA (US);
Abstract
A method is disclosed for making a molded refractory article comprising the steps of providing a mold including a molding pattern, the mold and molding pattern defining a mold cavity; filling the mold cavity around the molding pattern with a mixture comprising refractory particles and a heat fugitive binder; inserting a plurality of elements of relatively high melting point material into the mixture to displace a portion of the mixture; curing the mixture; separating the mold and molding pattern from the cured mixture; and sintering the combination of the cured mixture and mixture displacing elements to provide a reinforced molded refractory article. The mixture displacing elements preferably comprise a plurality of parallel tool steel rods. Also disclosed is an apparatus for molding the aforedescribed reinforced refractory article.