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. 16, 2002
Filed:
Dec. 09, 1999
Jonathan M. Lise, Woodbury, MN (US);
Chris A. Minick, Stillwater, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A resilient flexible sanding sponge including a foam backing layer having a layer of abrasive particles distributed along one of its major surfaces that are adhered together and to the backing layer by a layer of flexible adhesive material. That backing layer has about the same flexibility and conformability as the backing layers on prior art sanding sponges, while having a significantly higher tear strength than prior art sanding sponges. That high tear strength backing layer can either be (1) a layer of felted urethane foam; or (2) a layer of foam that encompasses a reinforcing material. When the backing layer is of felted urethane foam the layer of flexible adhesive material can have a major structurally sound portion below the surface along which the layer of abrasive particles is positioned and a minor portion adhering the abrasive particles along that surface to leave large portions of the abrasive particles projecting above the layer of adhesive material where they can effectively abrade a surface over which the sanding sponge is rubbed.