Howard S. Duff

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for making cellular composites using polymeric isocyanates...
- Patent number 7,199,168
- Issue date Apr 3, 2007
- Bayer MaterialScience LLC
- Kieth G. Spitler
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Treatment of cellulosic fiber products
- Patent number 5,674,568
- Issue date Oct 7, 1997
- Bayer Corporation
- Heber D. Layton
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Urea extended polyisocyanates
- Patent number 5,128,407
- Issue date Jul 7, 1992
- Miles Inc.
- Heber D. Layton
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

Information Patent Application
Process for making cellular composites using polymeric isocyanates...
- Publication number 20030153635
- Publication date Aug 14, 2003
- Kieth G. Spitler
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...