Patents by Inventor Hans K. Loo

Hans K. Loo 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).

  • Method of underwater granulation
    Patent number: 4264553
    Abstract: A process for extruding and granulating thermoplastic material comprises passing a thermoplastic melt through a face-cut extruder or melt pump having an insulated die plate where the insulated die plate consists of a die plate having on its face or as an integral part of the die plate which is in contact with the cooling liquid a member or portion having a plurality of cavities or pores which surround the extrusion holes, the cavities or pores being of a type that communicate with the cooling liquid. Also disclosed is the thermoplastic processing apparatus.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: April 28, 1981
    Assignee: Shell Oil Company
    Inventor: Hans K. Loo