Patents by Inventor Toshihiro Sugiwaki

Toshihiro Sugiwaki 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).

  • Lignin composition, method of producing the same and dispersing agent for cement used the same
    Patent number: 5811527
    Abstract: A lignin composition having a content of aluminum or iron or both at 0.05 to 5 wt. % (based on the solids of the lignin solution) and a content of extracts with chlorotrifluoroethylene dimer at 0.01 to 0.4 wt. % (based on solids in lignin solution). The lignin compositions possess high surface tension and are suitable as dispersing agents for cement.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: September 22, 1998
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Hideaki Ishitoku, Toshihiro Sugiwaki, Masanobu Kawamura, Tomoyuki Nakamoto
  • Production of novel condensates comprising bisphenols and aromatic aminosulfonic acids, condensates and dispersant, additive and water-reducing agent based thereon
    Patent number: 5233012
    Abstract: Novel condensates comprising bisphenols and aromatic aminosulfonic acids, in particular, novel 4-aminobenzenesulfonic acid-2,2-bis (hydroxyphenyl)propaneformaldehyde condensates, and methods for their production are disclosed. The novel condensates are useful as a dispersant for disperse dyes, an additive for carbonaceous fine powder-water slurries and as a water reducing agent for cement.
    Type: Grant
    Filed: June 8, 1992
    Date of Patent: August 3, 1993
    Assignee: Sanyo-Kokusaku Pulp Co., Ltd.
    Inventors: Masanobu Kawamura, Shinji Hamada, Takashi Date, Toshihiro Sugiwaki, Nobuhiro Hanada
  • Production of novel condensates comprising bisphenols and aromatic aminosulfonic acids, condensates and dispersant, additive and water-reducing agent based thereon
    Patent number: 5153299
    Abstract: A production method of novel condensates comprising bisphenols and aromatic aminosulfonic acids, in particular, novel 4-aminobenzenesulfonic acid-2, 2-bis(4-hydrocyphenyl)propaneformaldehyde type condensate and said condensate itself are disclosed. Uses of condensates as a dispersant for disperse dye, additive for carbonaceous fine powder-water slurry and water-reducing agent for cement are also claimed.
    Type: Grant
    Filed: August 14, 1990
    Date of Patent: October 6, 1992
    Assignee: Sanyo-Kokusaku Pulp Co., Ltd.
    Inventors: Masanobu Kawamura, Shinji Hamada, Takashi Date, Toshihiro Sugiwaki, Nobuhiro Hanada
  • Slump reduction-preventing agent and method for improving applicability of mortar concrete
    Patent number: 4367094
    Abstract: An agent for preventing deterioration in the slump properties of mortar concrete, containing as a main ingredient a lignin sulfonate having a carboxyl group content of at least 0.2 mols and a sulfon group content of at least 0.1 mols per phenyl propane unit. Disclosed is also a method for improving the workability of mortar concrete, comprising adding said agent to the mortar concrete in an amount of 0.05 to 0.5% in relation to cement and at any suitable point of time before or after mixing.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: January 4, 1983
    Assignee: Sanyo-Kokusaku Pulp Co., Ltd.
    Inventors: Yukio Fujimaru, Toshihiro Sugiwaki, Keiji Ueoka, Shigenobu Fujioka