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:
Apr. 13, 1993
Filed:
Feb. 28, 1990
Applicant:
Inventors:
Rosemarie Topfl, Dornach, CH;
Michael Bernheim, Arlesheim, CH;
Hubert Meindl, Riehen, CH;
Hans Wegmuller, Riehen, CH;
Peter Rohringer, Schonenbuch, CH;
Dieter Werthemann, Basel, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
162158 ; 1621643 ; 1621646 ; 1621682 ; 162175 ; 162179 ;
Abstract
Sizing agents of which some are novel and which have at least one anionic or acidic group which is optionally in the form of a salt and at least two hydrophobic substituents which each have at least 5 carbon atoms, at least two of the most adjacent hydrophobic substituents being bonded to each other with a linking member which has at least 2 hetero atoms, are particularly suitable for use, together with commercially available polymeric, cationic retention aids, in a process for sizing paper or cardboard.