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:
Nov. 26, 1991
Filed:
Dec. 21, 1989
Applicant:
Inventors:
Assignees:
Dupont-Mitsuj Fluorochemicals Co., Ltd., Tokyo, JP;
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C11D / ; C11D / ; B01F / ;
U.S. Cl.
CPC ...
252162 ; 252153 ; 252170 ; 252171 ; 252364 ; 252D / ; 252D / ;
Abstract
A mixed cleaning solvent containing dichlorotrifluoroethane and dimethoxymethane without containing Flon #113, which is suitable for cleaning and degreasing printed circuit boards and for eliminating flux residues and dust particles adhering thereon and which reveals high cleaning ability without occurrence of whity specks of volatilization residues including ionic residues on the treated surface with possible attainment of high stability to decomposition of the solvent component.