| Classification | Number | Url | PMD | Priority | Assignee | Assignee Loc | Inventor(s) | Inventor Loc(s) | Filing Date | Issued Date |
| classification-0 | 5,294,265 | Non-chrome passivation for metal substrates | 5,294,265 | Yes
| PPG Industries, Inc. | Pittsburgh, PA | Gray; Ralph C.:Pawlik; Michael J.:Prucnal; Paul J.:Baldy; Christopher J. | Butler, PA:Glenshaw, PA:Pittsburgh, PA:Warrendale, PA | March 15, 1993 | March 15, 1994 |