Patents by Inventor Tadashi Yoshii

Tadashi Yoshii 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).

  • Flame retardant additives based on alumina trihydrate and ethylene polymer compositions, containing same, having improved flame retardant properties
    Patent number: 4430470
    Abstract: Flame retardant additive comprising alumina trihydrate and a methyl hydrogen polysiloxane which when added to ethylene polymers provide compositions which have improved flame retardant properties, have reduced gas evolution, do not drip or give off noxious gases on burning and are particularly useful as jacketing material about wire and cables.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: February 7, 1984
    Assignee: Nippon Unicar Company Ltd.
    Inventors: Seiho Taniguchi, Yuichiro Sakuma, Tadashi Yoshii
  • Process for producing polyurethane foam using as a foam stabilizer an organosilicone oil and a hydrocarbon oil
    Patent number: 4210726
    Abstract: A process for producing high resilience polyurethane foam utilizing as a foam stabilizer a combination of an organosilicone oil of average molecular weight 200-2000 composed of the blocks represented by the formula ##EQU1## (where a+b is 1 to 3, b is 0 or 1, R is methyl group, and R' is a hydrocarbon group of 3-15 carbon atoms) and a hydrocarbon oil of average molecular weight 200-2000 containing more than 20 wt. % of alicyclic hydrocarbon and/or aromatic hydrocarbon.
    Type: Grant
    Filed: August 10, 1978
    Date of Patent: July 1, 1980
    Assignee: Union Carbide Corporation
    Inventors: Tadashi Hamamura, Isao Noda, Tadashi Yoshii, Masao Takase, Terumi Watanabe
  • Process for preparing polyphenylene oxides
    Patent number: 4067851
    Abstract: Polyphenylene oxides, self-condensation products of phenols, are prepared with a high yield through oxidative coupling by employing a catalyst system with higher activity, which comprises a copper compound, iodine or an iodine-containing compound and a primary amine.
    Type: Grant
    Filed: December 9, 1975
    Date of Patent: January 10, 1978
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Tetsuo Tomita, Tadashi Yoshii, Akira Ito
  • Process for producing polyphenylene oxides
    Patent number: 3989671
    Abstract: Polyphenylene oxides, self-condensation products of phenols, are produced through oxidative coupling by employing a novel catalyst system which comprises a copper compound, an iodine compound and tertiary diamine which is capable of forming a stable chelate ring with the copper compound.According to this invention, copper compounds, which hitherto have been considered to be unsuitable for using with tertiary amines, act with excellent performance as a component of the catalyst.
    Type: Grant
    Filed: February 22, 1974
    Date of Patent: November 2, 1976
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Eiichi Yonemitsu, Akitoshi Sugio, Tetsuo Tomita, Tadashi Yoshii, Akira Ito
  • Method of regenerating a degraded working solution for the production of hydrogen peroxide
    Patent number: 3965251
    Abstract: A working solution comprising anthraquinone and its derivatives, used for the production of hydrogen peroxide on becoming degraded by formation of non-effective anthraquinone is generated by an auto-oxidation process employing anthraquinone, which comprises:Contacting, at a temperature of below 130.degree.C., and in the presence of a catalyst comprising a metal selected from a platinum group and supported on a carrier, said degraded working solution, which comprises non-effective anthraquinone and tetrahydroanthraquinone with an olefinic compound whose hydrogenation product is gaseous at said contact temperature andSubsequently, contacting the thus treated working solution, at a temperature above 130.degree.C., and in the presence of a catalyst comprising a metal selected from the platinum group and supported on a carrier, with an olefinic compound whose hydrogenation product is gaseous at said contact temperature,Said method being characterized by the fact that at a temperature below 130.degree.C.
    Type: Grant
    Filed: August 2, 1973
    Date of Patent: June 22, 1976
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Hiroshi Shin, Junichiro Sugano, Tadashi Yoshii, Kichiro Iwamoto, Yasuhisa Kuriyama, Minoru Kakuda