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:
Mar. 08, 1977
Filed:
Apr. 05, 1972
Manley R Johnston, St. Paul, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
An improved low-density abrasive of the type wherein abrasive granules are bonded throughout a lofty, porous, compressible, non-woven fibrous web, the fibers bonded to each other and the abrasive granules bonded to the webs by a resin or the fibers of the web being bonded to each other by a first resin and the abrasive granules bonded to the web by a second resin. At least one of the resins employed in the present product is a hard, tough, polyisocyanurate resin having a minimum of 0.5 gram equivalent of isocyanurate per thousand grams of resin, the sum of the urethane plus isocyanurate equivalents being at least 1.3. The resulting product is useful for a wide spectrum of industrial and home abrasives applications.