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. 15, 1986
Filed:
Oct. 25, 1984
Applicant:
Inventors:
Leonard C Ellis, Chesapeake, VA (US);
Edwin D Little, Portsmouth, VA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; A62D / ; C01B / ;
U.S. Cl.
CPC ...
8561 ; 8592 ; 8650 ; 8110 ; 811568 ; 8918 ; 252-86 ; 25218823 ; 423265 ; 423515 ;
Abstract
Guar and xanthan gums are used as additives to sodium dithionite aqueous solutions for enhancing the stability of such solutions when in contact with air and used for vat dyeing of textiles and bleaching. The gums are added at levels of 0.1-0.2% by wt. and preferably at 0.15% by wt. of the solution. The stability of these polymeric-containing bleaching solutions is enhanced by more than 100-200%.