Patents by Inventor Tsutomu Kaneta

Tsutomu Kaneta 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).

  • Organic polymer separation membrane having fluorene skeleton and oxygen enrichment device utilizing same
    Patent number: 5116504
    Abstract: A separation membrane consisting of a polyamide having a unit (I) or a mixing of polyamides having units (I) and (II) and (II') or a polyester having a unit (III) or (IV) and (IV') or a mixture of polyesters having units (III) and (IV) and (IV'):--HN--X--NH--Z.sub.1 -- (I)--(HN--X--NH--Z.sub.1).sub.l -- (II)--(HN--X--NH--Z.sub.1 ').sub.n -- (II')--O--X--O--Z.sub.2 -- (III)--(O--X--O--Z.sub.2).sub.r -- (IV)--(O--X--O--Z.sub.2 ').sub.s -- (IV')wherein X represents ##STR1## where R represents H, CH.sub.3, or C.sub.2 H.sub.5 ; Z.sub.1 and Z.sub.2 represent ##STR2## Z.sub.1 ' represents --CO--(CH.sub.2).sub.p --CO--, Z.sub.2 ' represents --CO--CH.dbd.CH--CO--, p is an integer of 4 to 8, n/l is 1.0 to 20, and r/s is 0.5 to 100.
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: May 26, 1992
    Assignee: Nippon Steel Corporation
    Inventors: Masao Sakashita, Tetsuo Sakamoto, Shingo Kazama, Yoshiyuki Harada, Takero Teramoto, Kazuhiro Watanabe, Bunji Shimomura, Tsutomu Kaneta
  • Polysulfone separation membrane
    Patent number: 5049169
    Abstract: A separation membrane comprising a soluble aromatic polysulfone having the formula --(X--Y)--, wherein X and Y comprise the constituent unit shown below, and the inherent viscosity (.eta..sub.inh) based on the value of a solution of 0.5 g of the polysulfone dissolved in 100 ml of N-methyl-2-pyrrolidone measured at 30.degree. C. is 0.4 or more: ##STR1## wherein R.sub.1 -R.sub.4 are each either H, CH.sub.3 or C.sub.2 H.sub.5, and R.sub.5 -R.sub.6 are each either H, Cl, or NO.sub.2.
    Type: Grant
    Filed: May 22, 1990
    Date of Patent: September 17, 1991
    Assignees: Nippon Steel Corporation, Nippon Steel Chemical Co., Ltd.
    Inventors: Takerou Teramoto, Shingo Kazama, Tsutomu Kaneta, Masao Sakashita, Masaya Furukawa, Kazuto Shiraishi
  • Organic polymer separation membrane having fluorene skeleton and oxygen enrichment device utilizing same
    Patent number: 4975190
    Abstract: A separation membrane consisting of a polyamide having a unit (I) or a mixing of polyamides having units (I) and (II) an (II') or a polyester having a unit (III) or (IV) and (IV') or a mixture of polyesters having units (III) and (IV) and (IV'):--HN--X--NH--Z.sub.1 -- (I)--(HN--X--NH--Z.sub.1).sub.l -- (II)--HN--X--NH--Z.sub.1 ').sub.n -- (II')--O--X--O--Z.sub.2 -- (III)--(O--X--O--Z.sub.2).sub.r -- (IV)--O--X--O--Z.sub.2 ').sub.s -- (IV')wherein X represents ##STR1## where R represents H, CH.sub.3, or C.sub.2 H.sub.5 ; Z.sub.1 and Z.sub.2 represent ##STR2## Z.sub.1 ' represents --CO--(CH.sub.2).sub.p --CO--, Z.sub.2 ' represents --CO--CH.dbd.CH--CO--, p is an integer of 4 to 8, n/l is 1.0 to 20, and r/s is 0.5 to 100.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: December 4, 1990
    Assignee: Nippon Steel Corporation
    Inventors: Masao Sakashita, Tetsuo Sakamoto, Shingo Kazama, Yoshiyuki Harada, Takero Teramoto, Kazuhiro Watanabe, Bunji Shimomura, Tsutomu Kaneta
  • Organic polymer separation membrane having fluorene skeleton and oxygen enrichment device utilizing same
    Patent number: 4968331
    Abstract: A separation membrane consisting of a polyamide having a unit (I) or a mixing of polyamides having units (I) and (II) and (II') or a polyester having a unit (III) or (IV) and (IV') or a mixture of polyesters having unit (III) and (IV) and (IV'):--HN--X--NH--Z.sub.1 -- (I)--(NN--X--NH--Z.sub.1).sub.l -- (II)--(NN--X--Nh--Z.sub.1 ').sub.n -- (II')--O--X--O--Z.sub.2 -- (III)--(O--X--O--Z.sub.2).sub.r -- (IV)--O--X--O--Z.sub.2 ').sub.s -- (IV')wherein X represents ##STR1## where R represents H, CH.sub.3, or C.sub.2 H.sub.5 ; Z.sub.1 and Z.sub.2 represent ##STR2## Z.sub.1 ' represents --CO--(CH.sub.2).sub.p --CO--, Z.sub.2 ' represents --CO--CH.dbd.CH--CO--, p is an integer of 4 to 8, n/l is 1.0 to 20, and r/s is 0.5 to 100.
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: November 6, 1990
    Assignee: Nippon Steel Corporation
    Inventors: Masao Sakashita, Tetsuo Sakamoto, Shingo Kazama, Yoshiyuki Harada, Takero Teramoto, Kazuhiro Watanabe, Bunji Shimomura, Tsutomu Kaneta