Ralph D. Andrew

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Lancaster, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Preparing gasket compositions having expanded microspheres
- Patent number 5,132,061
- Issue date Jul 21, 1992
- Armstrong World Industries, Inc.
- Charles M. Lindeman
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Gasket composition having expanded microspheres
- Patent number 4,946,737
- Issue date Aug 7, 1990
- Armstrong World Industries, Inc.
- Charles M. Lindeman
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Asbestos free gasket forming compositions
- Patent number 4,330,442
- Issue date May 18, 1982
- Armstrong World Industries, Inc.
- Charles M. Lindeman
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...