Patent · US Expired

Method of removing contaminants from a surface

US4381951A · kind A · utility

2Cited by

9References

2Claims

0Family size

Assignee

Western Electric Company, Inc. · US

Inventors

William J. Baron · New York, US
John Kenney · Palo Alto, US
Wesley P. Townsend · Lawrence, US

Key dates

Filing date	Jan 22, 1982
Grant date	May 3, 1983
Priority date	—
Expiry date	Jan 22, 2002

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C18/1608
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method of removing contaminants from the surface is disclosed. The method comprises coating the surface with a surface active agent having a first surface energy and into which the contaminants are combined, applying thereover a higher surface energy colloidal sol and then allowing sufficient time for the first surface energy material with the contaminants combined therewith to migrate through the colloidal sol so as to remove the contaminants from the immediate vicinity of the substrate surface. The surface may then be treated by exposing it to an acid or base to remove the migrated surfactant layer thus removing the trace of contaminants.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.