Patents by Inventor Ryozo Tamada

Ryozo Tamada 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 depolymerizing polyethylene terephthalate and process for producing polyester resin
    Publication number: 20050096482
    Abstract: A method of depolymerizing polyethylene terephthalate, and a method of manufacturing a polyester resin. When heating, melting and depolymerizing polyethylene terephthalate to be recycled, the heating, melting and depolymerization reaction of the polyethylene terephthalate to be recycled are carried out all at once using one or a plurality of extruders or using an extruder and a reactor provided at an outlet of the extruder. When manufacturing a polyester resin, the reactants are irradiated with microwaves, thus promoting the heating of the reactants, and promoting the esterification reaction.
    Type: Application
    Filed: October 28, 2002
    Publication date: May 5, 2005
    Inventors: Ryozo Tamada, Yasuhiro Iguchi, Nobu Yoshimura, Shinichi Otuka