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. 18, 1992
Filed:
Aug. 31, 1989
Applicant:
Inventors:
Gary B Dunks, Upland, CA (US);
Akira Yamada, Claremont, CA (US);
Oh-Seung Kwon, Woodburg, MN (US);
Andrea Borgelt, Riverside, CA (US);
Assignee:
Iolab Corporation, Claremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264-17 ; 264-27 ; 623-6 ;
Abstract
Composite acrylic polymer rods having clear central regions and colored peripheral regions are prepared by polymerizing a flowable solution comprising acrylic monomer, dye and, dissolved therein, acrylic polymer, around a rod of acrylic polymer. Alternatively, a rod of acrylic polymer surrounded by a flowable mixture comprising partially polymerized acrylic monomer and dye is subjected to polymerization conditions to polymerize the flowable mixture.