Walter J. Robertson

Follow

Person

Aspinwall, PA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Silica-rich porous substrates with reduced tendencies for breaking...
- Patent number 4,933,307
- Issue date Jun 12, 1990
- PPG Industries, Inc.
- William P. Marshall
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Process of gas enrichment with porous siliceous-containing material
- Patent number 4,842,620
- Issue date Jun 27, 1989
- PPG Industries, Inc.
- Joseph J. Hammel
- C03 - GLASS MINERAL OR SLAG WOOL