Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5306526 | Method of treating nonferrous metal surfaces by means of an acid activating agent and an organophosphate or organophosphonate and substrates treated by such method | Ralph C. Gray, Charles F. Kahle, II, Paul J. Pruchal | 1994-04-26 |
| 5294265 | Non-chrome passivation for metal substrates | Ralph C. Gray, Paul J. Prucnal, Christopher J. Baldy | 1994-03-15 |