0000950128-96-000198 DEF 14A 1 19951231 19960229 NYSE PPG INDUSTRIES INC 0000079879 2851 250730780 PA 1231 DEF 14A 34 001-01687 96528433 ONE PPG PL 9 WEST CAROLYN A IHRIG PITTSBURGH PA 15272 4124343131 ONE PPG PLACE PITTSBURGH PA 15272 PITTSBURGH PLATE GLASS CO 19681219 DEF 14A 1 000095012896000198-001-seq1-def-14a.txt PPG DEF PROXY