Patents by Inventor Tomoko Tanma

Tomoko Tanma 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).

  • Patent number: 7507514
    Abstract: Toner containing binder resin constituted of plural types of copolymers comprising a vinyl type polymerizing monomer, wherein at least one of the copolymers comprising a vinyl type polymerizing monomer is one formed by utilizing a monomer provided with at least two polar groups.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: March 24, 2009
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoko Tanma, Meizo Shirose, Asao Matsushima
  • Patent number: 7402367
    Abstract: A toner comprising a compound represented by the following formula: R1O(R2O)nH where R1 is an aliphatic hydrocarbon group having 10 to 22 carbon atoms or a distyrene-substituted phenyl group; R2 is an alkylene group having 2 to 6 carbon atoms; and n is an integer of 1 to 15.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: July 22, 2008
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Tomoe Kitani, Asao Matsushima, Hiroyuki Kozuru, Tomoko Tanma
  • Patent number: 6994943
    Abstract: A toner for developing a static latent image is disclosed. The toner has a number based particle diameter distribution curve in which peak or maximum value is within the range of from 1.0 to 2.0 ?m, and ratio of particles having particle diameter of from 1.0 to 2.0 ?m is from 0.1 to 5.0% and ratio of particle having a diameter of at least 6.35 ?m is 5.0%.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: February 7, 2006
    Assignee: Konica Corporation
    Inventors: Tomoko Tanma, Asao Matsushima, Hiroyuki Kozuru, Tomoe Kitani
  • Publication number: 20060019186
    Abstract: A toner comprising a compound represented by the following formula: R1O(R2O)nH where R1 is an aliphatic hydrocarbon group having 10 to 22 carbon atoms or a distyrene-substituted phenyl group; R2 is an alkylene group having 2 to 6 carbon atoms; and n is an integer of 1 to 15.
    Type: Application
    Filed: July 20, 2004
    Publication date: January 26, 2006
    Inventors: Tomoe Kitani, Asao Matsushima, Hiroyuki Kozuru, Tomoko Tanma
  • Publication number: 20050277043
    Abstract: Toner containing binder resin constituted of plural types of copolymers comprising a vinyl type polymerizing monomer, wherein at least one of the copolymers comprising a vinyl type polymerizing monomer is one formed by utilizing a monomer provided with at least two polar groups.
    Type: Application
    Filed: June 6, 2005
    Publication date: December 15, 2005
    Inventors: Tomoko Tanma, Meizo Shirose, Asao Matsushima
  • Patent number: 6951702
    Abstract: A toner for developing a static image is disclosed. The toner has carboxyl group in an amount of from 0.1×10?5 to 2.0×10?5 moles/g in a condition that the toner particle is dispersed in water, and an amount of a metal element contained in the toner is from 10 to 5,000 ppm by weight based on the toner.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: October 4, 2005
    Assignee: Konica Corporation
    Inventors: Asao Matsushima, Hiroyuki Kozuru, Tomoe Kitani, Tomoko Tanma
  • Publication number: 20040072092
    Abstract: A toner for developing a static image is disclosed. The toner has carboxyl group in an amount of from 0.1×10−5 to 2.0×10−5 moles/g in a condition that the toner particle is dispersed in water, and an amount of a metal element contained in the toner is from 10 to 5,000 ppm by weight based on the toner.
    Type: Application
    Filed: May 23, 2003
    Publication date: April 15, 2004
    Inventors: Asao Matsushima, Hiroyuki Kozuru, Tomoe Kitani, Tomoko Tanma
  • Patent number: 6689522
    Abstract: An image forming method, comprising steps of: forming a latent image on a photoreceptor having an electrically conductive support having thereon a charge generating layer and a charge transporting layer; developing the latent image with a developer containing a toner to form a toner image on the photoreceptor; and transferring the toner image onto an image receiving member, wherein the ratio of 50% volume particle diameter to 50% number particle diameter of the toner is within the range of 1.0 to 1.15, the ratio of the cumulative 75% volume particle diameter from the largest particle diameter to the cumulative 75% number particle diameter from the largest particle diameter of the toner is 1.0 to 1.20 and the number of toner particles having a particle diameter of not larger than 0.7×Dp50 is at most 10% of the number of all the toner particles in the toner.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: February 10, 2004
    Assignee: Konica Minolta Technosearch Co., Ltd.
    Inventors: Hiroshi Yamazaki, Ken Ohmura, Akihiko Itami, Meizo Shirose, Asao Matsushima, Hiroyuki Kozuru, Tomoko Tanma
  • Publication number: 20030219671
    Abstract: A toner for developing a static latent image is disclosed. The toner has a number based particle diameter distribution curve in which peak or maximum value is within the range of from 1.0 to 2.0 &mgr;m, and ratio of particles having particle diameter of from 1.0 to 2.0 &mgr;m is from 0.1 to 5.0% and ratio of particle having a diameter of at least 6.35 &mgr;m is 5.0%.
    Type: Application
    Filed: May 9, 2003
    Publication date: November 27, 2003
    Inventors: Tomoko Tanma, Asao Matsushima, Hiroyuki Kozuru, Tomoe Kitani
  • Publication number: 20030054269
    Abstract: An image forming method, comprising steps of: forming a latent image on a photoreceptor having an electrically conductive support having thereon a charge generating layer and a charge transporting layer; developing the latent image with a developer containing a toner to form a toner image on the photoreceptor; and transferring the toner image onto an image receiving member,
    Type: Application
    Filed: April 19, 2002
    Publication date: March 20, 2003
    Inventors: Hiroshi Yamazaki, Ken Ohmura, Akihiko Itami, Meizo Shirose, Asao Matsushima, Hiroyuki Kozuru, Tomoko Tanma