Patents by Inventor Josef Dullings

Josef Dullings 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).

  • Mold for the production of flat moldings of curable casting resins
    Patent number: 5052916
    Abstract: To extend the useful life of the elastic seal (6) which is arranged between a base plate (1) and a cover plate (2) of molds for the production of flat moldings of curable casting resins and through the passages (8) of which the mold cavity is charged with the casting resin melt and vented and to accelerate venting and filling, the passages (8) are in the form of fixed capillary tubes (9) which project partly into the seal (6) and which are each adjoined by a channel (10) opening into the mold cavity (3) and closure needles (13) insertable into the channels are provided.
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: October 1, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef Dullings, Paul Vente, Werner Kloker
  • Apparatus for the production of low tension moulded parts
    Patent number: 4908216
    Abstract: A pacified mass is hardened under controlled conditions to produce low tension moulded parts (4) of duroplasts, the shringkage being compensated for by the movement of a lower mould part (2) and/or an upper mould part (3) to follow the mass.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: March 13, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef Dullings, Werner Kloker, Dieter Freitag, Holger Lusgen, Helmut Schmid, Helmut Winchenbach