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:
Dec. 08, 1981
Filed:
May. 19, 1980
Applicant:
Inventors:
David A Johnson, Norton, MA (US);
Robert L Lilly, Asheville, NC (US);
Assignee:
Akzona Incorporated, Asheville, NC (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
D06P / ; C08L / ; D06P / ; B32B / ;
U.S. Cl.
CPC ...
8568 ; 8585 ; 260 / ;
Abstract
There is disclosed a method for minimizing ozone fading in dyed polyamides by treating the dyed polyamide with a substituted piperidine thiourea of the formula ##STR1## where R is a lower alkyl radical having 1-5 carbon atoms or phenyl. The treated dyed polyamides, preferably in fiber form, display minimize ozone fade without a reduction in light stability.