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:
Feb. 26, 1991
Filed:
May. 18, 1989
Dainippon Plastics Co., Ltd., Tokyo, JP;
Abstract
A method of and apparatus for weather resistance test comprising a process for washing the surface of samples with a cleaner which is added at least between a process for condensing moisture on the surface of the sample after ultraviolet radiation has been applied and the process for again applying ultraviolet radiation after the process for condensing moisture. Impurities adhered to the surface of the sample and substances extracted on the surface of the sample can be removed by washing with the cleaner so that the surface of the sample to which these impurities and substances are adhered intact can be protected from being baked in the ensuing ultraviolet radiation application process. Consequently, generation of spot patterns and excessive color change of the surface of the sample can be prevented.