Patents by Inventor Paul J. Pruchal

Paul J. Pruchal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

Method of treating nonferrous metal surfaces by means of an acid activating agent and an organophosphate or organophosphonate and substrates treated by such method

Patent number: 5306526

Abstract: A method of treating a nonferrous metal substrate such as aluminum with an acid activating agent such as HF followed by treating with an organophosphate or organophosphonate. The treatment provides for improved adhesion and flexibility as well as resistance to humidity, salt spray corrosion and detergents of subsequently applied coatings.

Type: Grant

Filed: April 2, 1992

Date of Patent: April 26, 1994

Assignee: PPG Industries, Inc.

Inventors: Ralph C. Gray, Michael J. Pawlik, Charles F. Kahle, II, Paul J. Pruchal

Method of treating nonferrous metal surfaces by means of an acid activating agent and an organophosphate or organophosphonate and substrates treated by such method