Patents by Inventor Wolfgang Pungs

Wolfgang Pungs 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).

  • Apparatus for the continuous manufacture of phenolic resin foam in endless sheets
    Patent number: 4042314
    Abstract: An apparatus for the continuous manufacture of phenolic resin foam in an endless sheet which includes mixing means for expandable liquid phenolic resin with a blowing agent and an acid-containing curing agent, optionally with the addition of additives, and means for processing the mixture in a temperature-controllable double belt press. The apparatus also comprises a device for cooling the phenolic resin to a temperature of from about 8.degree. to about 15.degree. C.
    Type: Grant
    Filed: October 9, 1974
    Date of Patent: August 16, 1977
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Klaus Bruning, Hans Junger, Wolfgang Pungs, Peter Rheinfeld, Franz Weissenfels, Michael Wienand
  • Apparatus for the continuous manufacture of phenolic resin foam in endless sheets
    Patent number: 3999230
    Abstract: An apparatus for the continuous manufacture of phenolic resin foam in an endless sheet which includes means for mixing expandable liquid phenolic resin with a blowing agent and an acid-containing curing agent, optionally with the addition of additives, and means for processing the mixture in a temperature-controllable double belt press. The apparatus also comprises a device for cooling the phenolic resin to a temperature of from about 8 to about 15.degree. C.
    Type: Grant
    Filed: February 13, 1975
    Date of Patent: December 28, 1976
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Klaus Bruning, Hans Junger, Wolfgang Pungs, Peter Rheinfeld, Franz Weissenfels, Michael Wienand
  • Injection molding of polyamides prepared from terephthalic acid mono- or di-methyl esters and 2,2,4-and/or 2,4,4-trimethylhexamethylenediamine
    Patent number: 3962400
    Abstract: Injection molding process for polyamide composition and shaped articles produced therefrom wherein the polymer is the condensation product of a terephthalyl moiety and a 2,4,4- or 2,2,4-trimethylhexamethylenediamine-1,6 which polymer has a viscosity number of 120 to 180, preferably 125 to 140, as measured according to DIN 53,727.
    Type: Grant
    Filed: September 10, 1973
    Date of Patent: June 8, 1976
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Johannes Schneider, Wolfgang Pungs
  • Method of rotational molding vinylchloride-alkylene copolymer
    Patent number: 3950482
    Abstract: A copolymer of vinyl chloride with ethylene or propylene having a K-value of 45 to 65 and an alkylene (ethylene or propylene) content of 0.5 to 10 weight percent. This product is particularly useful for forming plasticizer-free coatings on substrates by known fluidized bed coating processes and for forming plastizer-free shaped articles by rotational molding processes.
    Type: Grant
    Filed: December 12, 1973
    Date of Patent: April 13, 1976
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Wolfgang Looman, Wolfgang Pungs, Egon Bierwirth, Robert Buning
  • Amorphous polyamide of C-alkyl substituted diamine and terephthalic acid dialkyl ester having improved electrical creep resistance
    Patent number: 3932362
    Abstract: A polyamide sheet having electrical creep resistance of quality class KA 3b according to Deutsche Industrie Norm 53,480, especially one prepared by a screw injection molding process utilizing a kneading action under a pressure of between 5 and 80 kiloponds per square centimeter at a temperature of 240.degree. to 320.degree.C utilizing a polyamide of an alkyl substituted aliphatic diamine and a lower alkyl ester of terephthalic acid.
    Type: Grant
    Filed: April 13, 1972
    Date of Patent: January 13, 1976
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Johannes Schneider, Wolfgang Pungs