Patents by Inventor Masakazu Kurokawa

Masakazu Kurokawa 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).

  • Cellulose ester film and its manufacturing method
    Patent number: 7399440
    Abstract: Disclosed is a cellulose ester film having a dry thickness of 20 to 60 ?m, wherein the cellulose ester film is manufactured according to a solution cast film manufacture process comprising the steps of providing a cellulose ester dope, casting the cellulose ester dope on a support to form a cellulose ester web, peeling the cellulose ester web at a peel position from the support, transporting the peeled web to a dryer, drying the peeled web therein to form a cellulose ester film, and winding the cellulose ester film around a spool, the residual solvent content at the winding step of the cellulose ester film being not more than 0.05% by weight.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: July 15, 2008
    Assignee: Konica Corporation
    Inventors: Kenichi Kazama, Takeshi Tanaka, Masakazu Kurokawa
  • Cellulose ester film and its manufacturing method
    Publication number: 20040155378
    Abstract: Disclosed is a cellulose ester film having a dry thickness of 20 to 60 &mgr;m, wherein the cellulose ester film is manufactured according to a solution cast film manufacture process comprising the steps of providing a cellulose ester dope, casting the cellulose ester dope on a support to form a cellulose ester web, peeling the cellulose ester web at a peel position from the support, transporting the peeled web to a dryer, drying the peeled web therein to form a cellulose ester film, and winding the cellulose ester film around a spool, the residual solvent content at the winding step of the cellulose ester film being not more than 0.05% by weight.
    Type: Application
    Filed: December 31, 2003
    Publication date: August 12, 2004
    Inventors: Kenichi Kazama, Takeshi Tanaka, Masakazu Kurokawa
  • Cellulose ester film and its manufacturing method
    Publication number: 20020156270
    Abstract: Disclose is a cellulose ester film having a dry thickness of 20 to 60 &mgr;m, wherein the cellulose ester film is manufactured according to a solution cast film manufacture process comprising the step of providing a cellulose ester dope, casting the cellulose ester dope on a support to form a cellulose ester web, peeling the cellulose ester web at a peel position from the support, transporting the peeled web to a dryer, drying the peeled web therein to form a cellulose ester film, and winding the cellulose ester film around a spool, the residual solvent at the winding step of the cellulose ester film being not more than 0.05% by weight.
    Type: Application
    Filed: January 31, 2002
    Publication date: October 24, 2002
    Inventors: Kenichi Kazama, Takeshi Tanaka, Masakazu Kurokawa