• US# 7407699: Extruded polypropylene sheets containing beta spherulites

• US# 6521675: Foamed polypropylene sheet having improved appearance and a foamable polypropylene composition therefor

• US# 6562447: Foamed polypropylene sheet having improved appearance and a foamable polypropylene composition therefor

• US# 5916953: Stiff, strong, tough glass-filled olefin polymer

• US# 5594070: Oriented polymeric microporous films

• US# 5317035: Oriented polymeric microporous films

• US# 5310584: Thermoformable polypropylene-based sheet

• US# 5176953: Oriented polymeric microporous films

• US# 5236963: Oriented polymeric microporous films

•US# 4975469: Oriented polymeric microporous films

• US# 4829839: Method for determining the environmental stress cracking resistance of plastic articles

• US# 4750369: Method and device for determining the environmental stress cracking resistance of plastic articles

• US20130202828: Laser Thermal Printing on Microporous Plastic Substrates

• US20020035164: Foamed polypropylene sheet having improved appearance and afoamable polypropylene composition therefor

• US20100143687: POLYPROPYLENE-BASED TAPE YARN PRODUCED FROM EXTRUDED FILM CONTAINING BETA SPHERULITES AND METHODS OF MAKING AND USING THEREOF

• US20090258212: EXTRUDED POLYPROPYLENE SHEETS CONTAINING BETA SPHERULITES

• US20060177632: Beta-nucleation concentrates for film applications

• US20050043447: Beta nucleation concentrate

• US20050003151: Extruded polypropylene sheets containing beta spherulites

• US20020161072: Wood fiber-filled polypropylene