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:
Jul. 31, 1990
Filed:
Sep. 09, 1988
Charles V Rue, Petersham, MA (US);
Leonard G Pukaite, West Boylsten, MA (US);
Krishnamoorthy Subramanian, Groton, MA (US);
Norton Company, Worcester, MA (US);
Abstract
Bonded abrasive grinding tools with more cost effective grinding performance than those known in the prior art for grinding certain types of hard metals may be made by combining in the tool both grits of conventional superabrasives and grits of aluminous abrasive characterized by a microstructure that predominantly comprises tightly packed, very fine crystals of alpha alumina or of an aluminum spinel such as magnesium aluminate. The predominant crystallites in the best type of aluminous abrasive have maximum dimensions of no more than about 0.3 micron and generally show little or no regular faceting at about 5,000 magnification and are approximately equiaxed, with no higher aspect ratio than 2, usually less than 1.5.