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:
Jun. 30, 1998
Filed:
Jul. 11, 1996
Daniel Perlman, Arlington, MA (US);
Robert H Black, New Rochelle, NY (US);
Brandeis University, Waltham, MA (US);
Abstract
A method for removing soiling and graffiti markings from a barrier coat previously formed on an underlying surface is provided, wherein the method preserves rather than sacrifices the barrier coat. The method includes applying a solvent system which includes at least one substantially non-toxic organic solvent such as 1-methyl-2-pyrrolidinone to an area of the barrier coat. A method is also provided to improve the resistance of a protective barrier coat to graffiti markings and other soiling over time and thereby facilitate any necessary cleaning of this barrier coat. The improvement in the case of wax coatings is achieved by including in the wax, at least one protective chemical agent selected from the group consisting of wax-soluble/water-insoluble UV light absorbers, wax-soluble/water-insoluble free-radical and peroxy-radical scavengers, and wax-soluble/water-insoluble wax antioxidants.