Patents by Inventor Hisashi Inokawa

Hisashi Inokawa 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).

  • Ultrarapid hardening cement composition and dispersant for ultrarapid hardening cement composition
    Patent number: 8076396
    Abstract: To provide an ultrarapid hardening cement composition with high strength, the composition having: excellent fluidity; excellent usable time; and excellent initial strength under low temperature atmosphere as well as under general temperature atmosphere, and improving strength and durability of a hardening product of the composition. An ultrarapid cement hardening composition comprising: an ultrarapid hardening cement (A) comprising a calcium aluminate; and a cement dispersant (B), wherein the cement dispersant (B) comprises a copolymer having: a repeating unit derived from a monomer represented by the following formula (1) and formula (2) as defined in the specification.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: December 13, 2011
    Assignees: Sumitomo Osaka Cement Co., Ltd, Nippon Shokubai Co., Ltd
    Inventors: Akira Ono, Hisashi Inokawa, Tsuyoshi Hirata, Hirokatsu Kawakami, Masami Hattori
  • ULTRARAPID HARDENING CEMENT COMPOSITION AND DISPERSANT FOR ULTRARAPID HARDENING CEMENT COMPOSITION
    Publication number: 20090131560
    Abstract: To provide an ultrarapid hardening cement composition with high strength, the composition having: excellent fluidity; excellent usable time; and excellent initial strength under low temperature atmosphere as well as under general temperature atmosphere, and improving strength and durability of a hardening product of the composition.
    Type: Application
    Filed: August 30, 2006
    Publication date: May 21, 2009
    Applicants: SUMITOMO OSAKA CEMENT CO. LTD, NIPPON SHOKUBAI CO. LTD
    Inventors: Akira Ono, Hisashi Inokawa, Tsuyoshi Hirata, Hirokatsu Kawakami, Masami Hattori
  • Additives for roller compacted concrete pavement
    Patent number: 5173117
    Abstract: An additive for roller compacted concrete pavement which controls the heat of hydration, prevents the reduction of packing of the pavement and prevents thermal cracking of the dried end product. The additive is a hydrolyzable tannin compound used alone or in conjunction with a surface active agent.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: December 22, 1992
    Assignee: Sumitomo Cement Co. Ltd.
    Inventors: Hisashi Inokawa, Kiyohiko Uchida, Kazuo Inada, Noriyuki Kozakai