Patents by Inventor Gunther Pfirrmann

Gunther Pfirrmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Large blow moldings made from polyethylene
    Publication number: 20050158496
    Abstract: Large blow moldings are made from polyethylene of density ??0.94 g/cm3 and of melt flow rate MFR 190/21.6<50 g/10 min, and of notched tensile impact strength azK (?30° C.) not less than 300 kJ/m2 and bursting strength, determined by a drop height test at ?18° C., of more than 3 m. Processes for producing large blow moldings of this type involve annealing large blow moldings after production. The moldings are used for storage and transport of hazardous materials.
    Type: Application
    Filed: March 14, 2005
    Publication date: July 21, 2005
    Inventors: Gunther Pfirrmann, Dieter Lilge, Gunter Hatzmann, Dieter Boes
  • Large blow moldings made from polyethylene
    Patent number: 6913729
    Abstract: Large blow moldings are made from polyethylene of density ??0.94 g/cm3 and of melt flow rate MFR 190/21.6<50 g/10 min, and of notched tensile impact strength azK (?30° C.) not less than 300 kJ/m2 and bursting strength, determined by a drop height test at ?18° C., of more than 3 m. Processes for producing large blow moldings of this type involve annealing large blow moldings after production. The moldings are used for storage and transport of hazardous materials.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: July 5, 2005
    Assignee: Elenac GmbH
    Inventors: Günther Pfirrmann, Dieter Lilge, Günter Hatzmann, Dieter Boes
  • Large blow moldings made from polyethylene
    Publication number: 20040131807
    Abstract: Large blow moldings are made from polyethylene of density &rgr;≧0.94 g/cm3 and of melt flow rate MFR 190/21.6<50 g/10 min, and of notched tensile impact strength azK (−30° C.) not less than 300 kJ/m2 and bursting strength, determined by a drop height test at −18° C., of more than 3 m. Processes for producing large blow moldings of this type involve annealing large blow moldings after production. The moldings are used for storage and transport of hazardous materials.
    Type: Application
    Filed: January 3, 2002
    Publication date: July 8, 2004
    Inventors: Gunther Pfirrmann, Dieter Lilge, Gunter Hatzmann, Dieter Boes
  • Process for increasing the flame resistance of polyethylene-containing hollowware
    Patent number: 6387314
    Abstract: A process for increasing the flame resistance of polyethylene-containing, single- or multilayer hollowware, in particular plastic fuel tanks, by heat treating the hollowware at 60-135° C.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: May 14, 2002
    Assignee: Basell Polyolefin GmbH
    Inventors: Wolfgang Rohde, Günther Pfirrmann, Peter Bauer, Andreas Haufe, Joachim Koch
  • Mixtures based on ethylene copolymers and asphalt
    Patent number: 3980598
    Abstract: Mixtures of asphalt and ethylene copolymers, in which asphalts from solvent extraction processes are used as asphalt. Compared to conventional molding materials comprising mixtures of straight-run asphalts and ethylene polymers, the compositions according to the invention show no exudation of oil. The molding materials may be converted to sheeting and be used in roofing, as container lining or as pipe coating.
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: September 14, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Moorwessel, Rudolf Glaser, Gunther Pfirrmann, Rudolf Konopka