Patents by Inventor Andras Riczko

Andras Riczko 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).

  • Process for preparing modified plastic materials
    Patent number: 4226750
    Abstract: Two plastics which were heretofore impossible to combine, can be combined with each other if the one to be added is converted to a porodin gel by heating the same at a temperature of at least 180.degree. C. with a substance that does not dissolve the polymer, and then cooling to below 120.degree.. The porodin gel can then be easily admixed with the other plastic material in an amount of 1 to 50% by weight, preferably 5 to 20% by weight based on the weight of the modified plastic material. Examples are the incorporation of polyethylene or polypropylene or polymethyl methacrylate in polyvinyl chloride, or the incorporation of polystyrene in polypropylene, or the incorporation of polymethyl methacrylate in polyethylene.
    Type: Grant
    Filed: June 13, 1978
    Date of Patent: October 7, 1980
    Assignee: Muanyagipari Kutato Intezet
    Inventors: Miklos Dimitrov, Franciska K. Keleman nee Gulyas, Richard Marko, Tamas Pazonyi, Bela Pukanszky, Andras Riczko