Paul J. Pruchal

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of treating nonferrous metal surfaces by means of an acid ac...
- Patent number 5,306,526
- Issue date Apr 26, 1994
- PPG Industries, Inc.
- Ralph C. Gray
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...