Patents by Inventor Tosinori Kadowaki

Tosinori Kadowaki 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).

  • Polytetrafluoroethylene fine powder and process for producing the same
    Patent number: 4159370
    Abstract: Polytetrafluoroethylene fine powders which have an average molecular weight of not less than 5,000,000, preferably not less than 5,500,000, an amorphous index of not more than 0.1, preferably not more than 0.09, a number average primary particle size of 0.1 to 0.4 micron, preferably 0.15 to 0.38 micron, and a sharp endothermic peak at a temperature between 343.degree. C. and 350.degree. C. on the melting diagram by a differential scanning calorimeter, said sharp peak having an endothermic ratio of not more than 0.3, preferably not more than 0.27, and a half value width of the endothermic peak of not more than 8 degrees, preferably not more than 6 degrees, and a process for producing the polytetrafluoroethylene fine powders. The polytetrafluoroethylene fine powders have an excellent stretchability and are useful for electric wire coating, small diameter tubes, large diameter tubes, sealing tapes and the like.
    Type: Grant
    Filed: November 11, 1977
    Date of Patent: June 26, 1979
    Assignee: Daikin Kogyo Co., Ltd.
    Inventors: Shun Koizumi, Shigeru Ichiba, Tetsuo Simizu, Chuzo Okuno, Tosinori Kadowaki, Katsutoshi Yamamoto
  • Polytetrafluoroethylene fine powder and process for producing the same
    Patent number: RE31341
    Abstract: Polytetrafluoroethylene fine powders which have an average molecular weight of not less than 5,000,000, preferably not less than 5,500,000, an amorphous index of not more than 0.1, preferably not more than 0.09, a number average primary particle size of 0.1 to 0.4 micron, preferably 0.15 to 0.38 micron, and a sharp endothermic peak at a temperature between 343.degree. C. and 350.degree. C. on the melting diagram by a differential scanning calorimeter, said sharp peak having an endothermic ratio of not more than 0.3, preferably not more than 0.27, and a half value width of the endothermic peak of not more than 8 degrees, preferably not more than 6 degrees, and a process for producing the polytetrafluoroethylene fine powders. The polytetrafluoroethylene fine powders have an excellent stretchability and are useful for electric wire coating, small diameter tubes, large diameter tubes, sealing tapes and the like.
    Type: Grant
    Filed: June 25, 1981
    Date of Patent: August 9, 1983
    Assignee: Daikin Kogyo Co., Ltd.
    Inventors: Shun Koizumi, Shigeru Ichiba, Tetsuo Shimizu, Chuzo Okuno, Tosinori Kadowaki, Katsutoshi Yamamoto