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:
May. 14, 1996
Filed:
Sep. 13, 1994
Applicant:
Inventor:
Jose B Rivera, Philadelphia, PA (US);
Assignee:
Bulk Chemicals, Inc., Leesport, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
436 56 ; 436-2 ; 436172 ;
Abstract
A method and composition for indicating the presence of a chrome-free pretreatment for improving the paint adhesion and corrosion resistance of a metal surface. The presence of the pretreatment is indicated by adding a compound to the chrome-free pretreatment which causes the pretreatment to fluoresce under an ultraviolet light. The additive which causes the pretreatment to fluoresce under an ultraviolet light is an ultraviolet tracer, such as a stilbene or a coumarin derivative, and the method according to this invention includes exposing the coated metal to ultraviolet light.