Patents by Inventor Erich Pellkofer

Erich Pellkofer 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).

  • Publication number: 20030175492
    Abstract: The invention relates to thermoplastic molding compounds, comprising at least (A) 10 to 99.99 wt.-% of a polyoxymethylene homopolymer or copolymer, at least (B) 0.01 to 5 wt.-% of a polyethylenimine homopolymer or copolymer, at least (C) 0.1 to 15 wt.-% of a polyalkylene glycol or polyalkylene glycolamine or the mixtures thereof, (D) 0 to 70 wt.-% of further additives, whereby the sum of the weight percentages of components (A) to (D) always adds up to 100%.
    Type: Application
    Filed: December 30, 2002
    Publication date: September 18, 2003
    Inventors: Burkhardt Dames, Erich Pellkofer
  • Patent number: 6262185
    Abstract: The invention relates to the use of thermoplastic polyester molding compounds, containing A) 80 to 100 wt. % of a polyalkylene arylate, especially polybutyleneterephthalate, with a half-width of crystallization heat releases of ≦5° C. and B) 0 to 20 wt. % of other additives, the weight percentages of constituents A) and B) adding up to 100%, for producing molded bodies by blow-molding, profile extrusion and/or pipe extrusion. A preferred use for the inventive molding compounds is the production of light guide sheathing. The invention also relates to a 3-stage method for producing the polyesters as follows: a) esterification or re-esterification of an aromatic dicarboxylic acid or its derivative and a glycol; b) precondensation; and c) polycondensation to a viscosity number of at least 158 ml/g. The reaction is carried out in at least 2 temperature zones in stages a) and b).
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: July 17, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Heitz, Peter Braune, Herbert Fisch, Erich Pellkofer, Georg Schneider
  • Patent number: 5026763
    Abstract: Polyamide molding materials having high heat distortion resistance for the production of blow-molded articles contain essentially two highly viscous polyamides which are homogeneously miscible with one another and have melting points which differ by 10.degree.-50.degree. C., the amount of the polyamide having the low melting point being from 5 to 40% by weight and the amount of that having the high melting point being from 60 to 95% by weight.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: June 25, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Volker Lohrbaecher, Erich Pellkofer