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:
Sep. 15, 1981
Filed:
Mar. 05, 1980
Applicant:
Inventors:
Robert G Briody, Corpus Christi, TX (US);
Frances M Cummings, Corpus Christi, TX (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2041 / ; 568852 ;
Abstract
The ultraviolet light transmittance of ethylene glycol containing ultraviolet light absorbing impurities is increased by exposing the ethylene glycol to ultraviolet radiation at a wavelength of at least 220 nanometers from a controllable ultraviolet radiation emission source.