Patents Assigned to Kanto Chemical Co., Inc.
  • Cleaning solution for semiconductor substrate
    Patent number: 7312186
    Abstract: A cleaning solution for semiconductor substrates comprising a nonionic surface active agent of the formula (1) and/or the formula (2), a chelating agent and a chelating accelerator: CH3—(CH2)l—O—(CmH2mO)n—X ??(1) wherein l, m and n independently represent a positive number, and X represents a hydrogen atom or a hydrocarbon group; CH3—(CH2)a—O—(CbH2bO)d—(CxH2xO)y—X ??(2) wherein a, b, d, x and y independently represent a positive number, b and x are different, and X represents a hydrogen atom or a hydrocarbon group.
    Type: Grant
    Filed: January 5, 2004
    Date of Patent: December 25, 2007
    Assignees: Kanto Chemical Co., Inc., NEC Electronics Corporation
    Inventors: Masayuki Takashima, Yoshiko Kasama, Hiroaki Tomimori, Hidemitsu Aoki
  • Colorless liquid crystalline compounds
    Patent number: 4564694
    Abstract: A colorless liquid crystalline compound having at least one 6-membered ring and non-cyclic end groups in the molecular skelton, said 6-membered containing two or more carbon atoms, at least one of which is directly bonded to a methylene group of a non-cyclic group having an alkoxy group at another end has a wide mesomorphic range. When said colorless liquid crystalline compound is mixed with a liquid crystal composition, the resulting mixture also has an enlarge mesomorphic range and in almost all cases has a reduced viscosity.
    Type: Grant
    Filed: February 24, 1982
    Date of Patent: January 14, 1986
    Assignees: Hitachi, Ltd., Kanto Chemical Co., Inc.
    Inventors: Yoichi Hirai, Tsunenori Fujii, Kaoru Koto, Kenji Suzuki, Masahiro Yoshida, Hisashi Okawa, Yoshiaki Okabe, Teruo Kitamura, Hisao Yokokura, Shintaroo Hattori, Akio Mukoh, Mikio Sato
  • Particle-packed fiber article having antibacterial property
    Patent number: 4525410
    Abstract: Specific zeolite particles retaining therein a metal ion having a bactericidal activity are packed and retained in a mixed fiber assembly composed of low-melting thermoplastic synthetic fibers and ordinary fibers. The zeolite particles are retained by welding of the low-temperature thermoplastic synthetic fibers but in a state of allowing the contact thereof with an external fluid. The particle-packed fiber article has an excellent and durable antibacterial activity and can be used in various fields.
    Type: Grant
    Filed: August 24, 1983
    Date of Patent: June 25, 1985
    Assignees: Kanebo, Ltd., Kanto Chemical Co., Inc.
    Inventors: Zenji Hagiwara, Hideo Ohki, Shigetaka Hoshino, Saburo Nohara, Shunya Ida, Kenichi Tagawa
  • Negative-working photoresist coating composition
    Patent number: 4525523
    Abstract: There is proposed a negative-working photoresist coating composition of an improved resolution, which comprises a cyclized polyisoprene having a weight-average molecular weight of 10,000 to 100,000 and a molecular weight distribution of not more than 1.9, an organic solvent of the cyclized polyisoprene, and a bisazido compound as a crosslinking agent.
    Type: Grant
    Filed: August 26, 1983
    Date of Patent: June 25, 1985
    Assignees: Kanto Chemical Co., Inc., Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Hatsuo Nakamura, Tiharu Kato, Toshio Yonezawa, Shigeo Koguchi, Kiyoto Mori, Masahiko Igarashi