Patents by Inventor Tsutomu Sakaida

Tsutomu Sakaida 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).

  • Agents for maintaining undifferentiated state and promoting proliferation of stem cells
    Patent number: 10259772
    Abstract: An object of the present invention is to find a novel substance that is capable of efficiently promoting the proliferation of stem cells while maintaining the undifferentiated state thereof and to provide the substance as an agent for maintaining the undifferentiated state of stem cells or an agent for promoting the proliferation of stem cells. Another object of the present invention is to provide an agent for treating a wound that has a wound healing effect on the skin and is readily available in the field of skin regenerative medicine or cosmetic treatment, and safe and inexpensive.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: April 16, 2019
    Assignee: Nippon Menard Cosmetic Co., Ltd.
    Inventors: Seiji Hasegawa, Yu Inoue, Yuichi Hasebe, Tsutomu Sakaida
  • AGENTS FOR MAINTAINING UNDIFFERENTIATED STATE AND PROMOTING PROLIFERATION OF STEM CELLS
    Publication number: 20170320809
    Abstract: An object of the present invention is to find a novel substance that is capable of efficiently promoting the proliferation of stem cells while maintaining the undifferentiated state thereof and to provide the substance as an agent for maintaining the undifferentiated state of stem cells or an agent for promoting the proliferation of stem cells. Another object of the present invention is to provide an agent for treating a wound that has a wound healing effect on the skin and is readily available in the field of skin regenerative medicine or cosmetic treatment, and safe and inexpensive.
    Type: Application
    Filed: November 5, 2015
    Publication date: November 9, 2017
    Applicant: NIPPON MENARD COSMETIC CO., LTD.
    Inventors: Seiji HASEGAWA, Yu INOUE, Yuichi HASEBE, Tsutomu SAKAIDA
  • Composite carrier particles for electrophotography and process for producing the same
    Patent number: 5108862
    Abstract: Disclosed herein are composite carrier particles for electrophotography comprising 80 to 99% by weight of ferromagnetic fine particles and a phenol resin, and having a number-average particle diameter of 10 to 1,000 .mu.m, a bulk density of not more than 2.0 g /cm.sup.3, and a curved surface configuration, and a process for producing the same.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: April 28, 1992
    Assignees: Toda Kogyo Corp., Unitika Ltd.
    Inventors: Souichiro Kishimoto, Tsutomu Sakaida, Yoshiaki Echigo, Keiichi Asami, Tetsuro Toda, Kazuo Fujioka, Eiichi Kurita, Toshiyuki Hakata, Shigeru Takaragi
  • Process for removing heavy-metal ions from aqueous solution
    Patent number: 4323458
    Abstract: An etherified phenolic chelate resin prepared by stabilizing and protecting the chelate groups of a phenolic chelate resin and then converting some or all of the phenolic hydroxyl groups into either groups; a process for the production of the etherified phenolic chelate resin; and a method for separating a heavy metal ion from an aqueous solution having a pH of at least 7 by using this etherified phenolic chelate resin.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: April 6, 1982
    Assignee: Unitika Ltd.
    Inventors: Hiroyuki Uejima, Masahide Hirai, Tsutomu Sakaida
  • Etherified phenolic chelate resin, process for its production, and method for adsorption treatment
    Patent number: 4266045
    Abstract: An etherified phenolic chelate resin prepared by stabilizing and protecting the chelate groups of a phenolic chelate resin and then converting some or all of the phenolic hydroxyl groups into ether groups; a process for the production of the etherified phenolic chelate resin; and a method for separating a heavy metal ion from an aqueous solution having a pH of at least 7 by using this etherified phenolic chelate resin.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: May 5, 1981
    Assignee: Unitika Ltd.
    Inventors: Hiroyuki Uejima, Masahide Hirai, Tsutomu Sakaida