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:
Aug. 31, 1976
Filed:
May. 09, 1974
Applicant:
Inventors:
Assignee:
Mitsubishi Rayon Co., Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; B29D / ;
U.S. Cl.
CPC ...
264 25 ; 264166 ; 264236 ; 264255 ; 264331 ; 264338 ; 264347 ;
Abstract
An improvement in a process for producing a synthetic resin cast article having an abrasion-resistant polymer surface layer integrated with the polymer body is provided. The improvement is characterized in that the abrasion-resistant polymer surface layer is formed by a two step polymerization procedure; in the first polymerization step, the polymerizable material is covered with a covering body such as a polymer film, closely adhered thereto, and in the second polymerization step, the polymerizable material is exposed to the air.