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:
Oct. 02, 1979
Filed:
Feb. 07, 1977
Applicant:
Inventors:
Fritz Fleck, Bottmingen, CH;
Emmanuel Hervot, Bonnieres, FR;
Peter Merk, Muttenz, CH;
Horst Schmid, Reinach, CH;
Achim Wiedemann, Weil-am-Rhein, DE;
Assignee:
Sandoz Ltd., Basel, CH;
Primary Examiner:
Int. Cl.
CPC ...
D06P / ;
U.S. Cl.
CPC ...
8 1 / ; 8 85 / ; 8 86 ; 8 88 ; 8 93 ; 8168 / ; 8172 / ; 8176 ; 8178 / ; 25230121 ;
Abstract
Disclosed is an optical brightening process for substrates comprising or consisting of synthetic polyamide in which the optical brightener is applied to the substrate by impregnation followed by heat treatment and wherein the brightener is applied in the presence of a compound or mixture of compounds of formula I,