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. 18, 2001
Filed:
Nov. 09, 1999
Applicant:
Inventors:
Robert D. P. Hei, Baldwin, WI (US);
Kim R. Smith, Woodbury, MN (US);
Wendy Wiseth, St. Paul, MN (US);
Assignee:
Ecolab Inc., St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06L 1/02 ; C11D 3/20 ; C11D 3/30 ;
U.S. Cl.
CPC ...
D06L 1/02 ; C11D 3/20 ; C11D 3/30 ;
Abstract
An improved process for removing ink soil from porous substrates, preferably from woven fabrics which include cellulosic materials such as cotton towels is described herein. The process includes an initial contacting step with an alkyl fatty acid ester, a wash step with a conventional detergent and a final water rinse step. A chelating agent is used during one of the first two steps or, alternatively, between the first two steps.