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. 17, 1999
Filed:
Jun. 14, 1996
Applicant:
Inventors:
Tzu-Li J Huang, Woodbury, MN (US);
David A Kaisaki, St. Paul, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B05D / ;
U.S. Cl.
CPC ...
428323 ; 4273977 ; 427577 ; 427579 ; 428328 ; 428329 ; 428330 ; 428331 ; 428332 ; 428336 ; 428913 ;
Abstract
A hydrophilic polymeric article has metal oxide particles dispersed throughout a polymeric binder material. A major surface of the polymeric material is treated so as to remove polymeric binder to provide a higher ratio of metal to carbon atoms on the major surface of the polymeric article relative to its interior. The polymeric article provides extraordinary water-spreading effects on the major surface, making the article particularly suitable for use as a surface covering on a retroreflective sheeting.