Patents by Inventor Adrianus Trapman

Adrianus Trapman 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).

  • Mixed synthetic ester lubricants as useful polymeric fiber lubricants
    Patent number: 3959187
    Abstract: Improved water-emulsifiable ester lubricants for polymeric and metal materials are provided which yield stable emulsions even in the absence of emulsifying agents. The ester lubricants are obtainable from a higher molecular weight di- or polycarboxylic acid and a polyalkoxylated lower alkyl alcohol.
    Type: Grant
    Filed: December 19, 1974
    Date of Patent: May 25, 1976
    Assignee: Emery Industries, Inc.
    Inventors: Arie Dick Kardol, Adrianus Trapman, Gijsbert VAN DER Waal