John B. Penn

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Pleasant Hills, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Low molecular weight polystyrene resin and methods of making and us...
- Patent number 8,946,365
- Issue date Feb 3, 2015
- Eastman Chemical Company
- Wei Min Cheng
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Low molecular weight polystyrene resin and methods of making and us...
- Patent number 8,829,105
- Issue date Sep 9, 2014
- Eastman Chemical Company
- Wei Min Cheng
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

Information Patent Application
LOW MOLECULAR WEIGHT POLYSTYRENE RESIN AND METHODS OF MAKING AND US...
- Publication number 20130225751
- Publication date Aug 29, 2013
- Eastman Chemical Company
- Wei Min Cheng
- B60 - VEHICLES IN GENERAL
Information Patent Application
LOW MOLECULAR WEIGHT POLYSTYRENE RESIN AND METHODS OF MAKING AND US...
- Publication number 20130184425
- Publication date Jul 18, 2013
- Eastman Chemical Company
- Wei Min Cheng
- B60 - VEHICLES IN GENERAL