Patents by Inventor Sueo Nagatomo

Sueo Nagatomo 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).

  • Process for producing aqueous cellulose derivative dispersions
    Publication number: 20040082777
    Abstract: A method of producing a cellulose derivative aqueous dispersion, comprising:
    Type: Application
    Filed: July 29, 2003
    Publication date: April 29, 2004
    Inventors: Etsuo Kamada, Masatoshi Tanouchi, Sueo Nagatomo
  • Excipient having high compactability and process for preparing same
    Patent number: 5574150
    Abstract: Disclosed is an excipient comprising white powdery microcrystalline cellulose having an average degree of polymerization of from 100 to 375 and an acetic acid holding capacity of 280% or more, and having a specific compression characteristic satisfying an equality of formula (1): ##EQU1## wherein a is from 0.85 to 0.90, b is from 0.05 to 0.10, P represents the compression pressure (kgf/cm.sup.2) applied to the microcrystalline cellulose, V.sub.o represents the apparent specific volume (cm.sup.3 /g) of the microcrystalline cellulose, and V.sub.p represents the specific volume (cm.sup.3 /g) of the microcrystalline cellulose at the compression pressure P. The excipient of the present invention exhibits not only high compactability but also high rate of disintegration. The excipient of the present invention can be advantageously obtained by heat-treating an aqueous dispersion of purified cellulose particles, which has a solids content of 40% or less by weight, at 100.degree. C.
    Type: Grant
    Filed: January 3, 1994
    Date of Patent: November 12, 1996
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshihito Yaginuma, Sueo Nagatomo, Hiroto Miyamoto