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:
Jan. 31, 1984
Filed:
Jun. 02, 1981
Applicant:
Inventor:
Lawrence E Howard, Escondido, CA (US);
Assignee:
Napp Systems (USA), Inc., San Marcos, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03D / ;
U.S. Cl.
CPC ...
354317 ; 354320 ; 354325 ; 15 77 ; 118304 ; 118427 ; 430309 ;
Abstract
An apparatus and method in which a coating is wetted with a solvent to initiate dissolution of soluble coating portions and the hydraulic pressure of the solvent at the surface of the coating is repeatedly increased and decreased to assist in the dissolution of the soluble coating portions. A brush with an array of bristles reciprocating in a path perpendicular to the coating may be utilized to produce the increasing and decreasing hydraulic pressure. Also, the coating may be immersed in the solvent to wet it and to initiate dissolution of the soluble coating portions.