Patents by Inventor Masayuki Ikegami

Masayuki Ikegami 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).

  • Publication number: 20070015856
    Abstract: Disclosed herein are a functional-substance-including structured material having good dispersion stability, and an ink composition, which inhibits aggregation by interaction between particles, and has stable dispersibility in a solvent and good coloring ability and fixing ability. The functional-substance-including structured material comprises a plurality of functional substances different from each other physically included in a block polymer or graft polymer. The ink composition comprises the functional-substance-including structured material, and a solvent or dispersing medium.
    Type: Application
    Filed: August 4, 2004
    Publication date: January 18, 2007
    Inventors: Koichi Sato, Ikuo Nakazawa, Sakae Suda, Ryuji Higashi, Masayuki Ikegami, Keiichiro Tsubaki
  • Patent number: 7157539
    Abstract: A composition containing a polymer compound and medium being a solvent or a binder resin, wherein the polymer compound comprises monomer units represented by the general formula (1): wherein A is a straight-chain or branched alkylene group of 1 to 15 carbon atoms, which may be substituted; m is an integer of 0 to 30, and; B is a single bond or alkylene, which may be substituted; D is an aromatic ring structure; n is an integer of 1 to 10, and R is a hydrogen atom, an alkyl group, which may be substituted, an aromatic ring structure, or a mono- or poly-valent metal cation.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: January 2, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Sato, Ikuo Nakazawa, Sakae Suda, Masayuki Ikegami, Keiichiro Tsubaki
  • Patent number: 7151156
    Abstract: The present invention provides a block polymer that comprises a plurality of block segments, wherein at least one block segment comprises a repeating unit having an ester moiety bonded to a main chain in a forward direction through a connecting group of two or more atoms, and the block polymer has a molecular weight distribution (Mw/Mn) of 1.3 or less. Also provided is a polymer composition containing the above block polymer and a functional material.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: December 19, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Sato, Masayuki Ikegami, Sakae Suda, Ikuo Nakazawa, Keiichiro Tsubaki
  • Publication number: 20060281870
    Abstract: A block polymer compound containing block segments, characterized in that at least one hydrophilic segment among the block segments is a copolymer segment composed of an ionic or hydrophilic repeating unit structure and a hydrophobic repeating unit structure.
    Type: Application
    Filed: September 30, 2004
    Publication date: December 14, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Koichi Sato, Ikuo Nakazawa, Sakae Suda, Ryuji Higashi, Masayuki Ikegami, Keiichiro Tsubaki
  • Publication number: 20060250463
    Abstract: A recording method includes the steps of: preparing a first ink composition containing a solvent, a coloring material and an anionic polymer, in which the coloring material is incorporated in the anionic polymer, and a second ink composition containing a solvent, a coloring material and a cationic polymer; and applying the first ink composition and the second ink composition onto a medium by bringing the compositions into contact with each other. The contact increases the viscosity of at least one of the anionic polymer and the cationic polymer.
    Type: Application
    Filed: May 2, 2005
    Publication date: November 9, 2006
    Applicant: Canon Kagushiki Kaisha
    Inventors: Ikuo Nakazawa, Koichi Sato, Ryuji Higashi, Sakae Suda, Masayuki Ikegami, Keiichiro Tsubaki, Keiko Yamagishi
  • Publication number: 20060244800
    Abstract: A block copolymer including two or more segments, wherein at least one of the segments is a gradient copolymer including two or more monomer components.
    Type: Application
    Filed: October 29, 2004
    Publication date: November 2, 2006
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Ikuo Nakazawa, Koichi Sato, Sakae Suda, Ryuji Higashi, Masayuki Ikegami, Keiichiro Tsubaki
  • Publication number: 20060235177
    Abstract: There is provided a polymer compound including a repetitive unit structure represented by the following general formula (2): General formula (2): (where X? represents a polyalkenyl group; A represents a linear or branched alkylene group having a carbon atom number of 1 to 15, which may be substituted; m represents an integer of 0 to 30; B represents a single bond or an alkylene group which may be substituted; D represents an aromatic ring structure which may be substituted; n represents an integer of 0 to 10; and R represents a hydrogen atom, an alkyl group which may be substituted, or an aromatic ring structure which may be substituted). The polymer compound is suitable for improving dispersibility of a coloring material or solid material in an ink composition or toner composition.
    Type: Application
    Filed: April 30, 2004
    Publication date: October 19, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Masayuki Ikegami, Koichi Sato, Ikuo Nakazawa, Sakae Suda, Keiichiro Tsubaki, Ryuji Higashi, Keiko Yamagishi
  • Publication number: 20060221117
    Abstract: In an image forming method which imparts two or more kinds of liquid compositions onto a recording medium to form an image on the recording medium, the image forming method has the steps of: preparing a plurality of liquid compositions which include at least a first liquid composition containing a functional substance, an anionic amphiphilic polymer and a liquid medium and a second liquid composition containing a functional substance, a polyvalent cation, an anionic amphiphilic polymer and a liquid medium; at least one of the polymer in the first liquid composition and the polymer in the second liquid composition being a block polymer or a graft polymer, and imparting the first liquid composition and the second liquid composition onto the recording medium to bring the first liquid composition and the second liquid composition into contact with each other to cause at least one of these liquid compositions to thicken.
    Type: Application
    Filed: March 2, 2005
    Publication date: October 5, 2006
    Inventors: Koichi Sato, Ikuo Nakazawa, Ryuji Higashi, Sakae Suda, Masayuki Ikegami, Keiichiro Tsubaki, Keiko Yamagishi
  • Publication number: 20060194935
    Abstract: Polyalkenyl ether is produced by polymerizing alkenyl ether represented by the following general formula (I): CHR1?CH(OR2)??(I) wherein R1 represents a hydrogen atom or a methyl group, R2 represents a monovalent organic group, and R2 contains a silicon atom or at least one atom selected from the group consisting of elements from group 15 to group 17, in the presence of a halide of an element other than Al, or an organometallic compound of an element other than Al, and a nonionic oxygen-containing or nonionic nitrogen-containing organic compound.
    Type: Application
    Filed: August 30, 2005
    Publication date: August 31, 2006
    Applicants: Canon Kabushiki Kaisha
    Inventors: Sadahito Aoshima, Ikuo Nakazawa, Koichi Sato, Masayuki Ikegami, Shokyoku Kanaoka, Tomohide Yoshida, Yasuhiro Matsuda, Arihiro Kanazawa
  • Publication number: 20060178468
    Abstract: A polymer compound is provided which is suitable to improve the dispersibility of coloring materials or solids in an ink or toner composition and which has a repeating unit represented by the general formula (2): (2) wherein X? represents a polyalkenyl group; each A represents independently a linear or branched alkylene group of 1 to 15 carbon atoms which may be substituted; m represents an integer of 0 to 30; B represents a single bond or an alkylene group which may be substituted; each D represents independently an aromatic ring in which at least one hydrogen atom attached to the ring is displaced by a fluorine atom; n represents an integer of 1 to 10; and R represents a hydrogen atom, an alkyl group which may be substituted, or an aromatic ring which may be substituted.
    Type: Application
    Filed: April 30, 2004
    Publication date: August 10, 2006
    Applicant: Canon Kaushiki Kaisha
    Inventors: Koichi Sato, Ikuno Nakazawa, Sakae Suda, Masayuki Ikegami, Keiichiro Tsubaki, Ryuji Higashi, Keiko Yamagishi
  • Patent number: 7085629
    Abstract: The system for transmitting and receiving electronic mail of the present invention, comprises: a text input means for entering a text of the electronic mail to be transmitted; an extracting means for extracting a character string to specify a place from the text inputted by the text input means; an adding means for adding information to the electronic mail, the information corresponding to the place specified by the extracted character string; a text display means for displaying the text in the electronic mail; and a map display means for displaying map information indicating the specified place corresponding to the information added to the electronic mail.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: August 1, 2006
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Shinichirou Gotou, Takeshi Imai, Masayuki Ikegami, Hideshi Sawada, Toshihide Youfu
  • Publication number: 20060160975
    Abstract: Disclosed herein are a polymer compound having at least two block segments, wherein at least one segment of the block segments contains a repeating unit structure exhibiting anionicity and a repeating unit structure exhibiting hydrophilicity, and an ink composition containing the polymer, a solvent or dispersing medium, and a coloring material.
    Type: Application
    Filed: May 19, 2004
    Publication date: July 20, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Sakae Suda, Koichi Sato, Ikuo Nakazawa, Masayuki Ikegami, Keiichiro Tsubaki, Ryuji Higashi, Keiko Yamagishi
  • Publication number: 20060144287
    Abstract: A compound represented by the following general formula (1): (1) wherein A represents an alkenyl ether group which may be substituted; B represents a linear or branched alkylene group having 1 to 15 carbon atoms which may be substituted; m represents an integer from 0 to 30; when m is larger than 1, B may be different from each other; D represents a single bond or a linear or branched alkylene group having 1 to 10 carbon atoms which may be substituted; E represents any one of an aromatic ring which may be substituted, a condensed ring which may be substituted, and a structure formed by bonding through single bonds at most three aromatic rings which may be substituted; R represents a hydrogen atom, a linear or branched alkyl group having 1 to 5 carbon atoms which may be substituted, or an aromatic ring which may be substituted; n represents a positive number larger than 1; a COOR group in the formula is substituted into the aromatic ring of E; and a hydrogen atom in the aromatic ring, which is not substituted
    Type: Application
    Filed: October 27, 2004
    Publication date: July 6, 2006
    Inventors: Keiichiro Tsubaki, Koichi Sato, Ikuo Nakazawa, Ryuji Higashi, Sakae Suda, Masayuki Ikegami, Keiko Yamagishi
  • Publication number: 20060148997
    Abstract: The present invention relates to a stimuli-responsive composition that comprises a polymer, a solvent and a substance having a predetermined function. One embodiment of the present invention is a composition comprising a block polymer, a solvent and a substance having a predetermined function. The present invention also relates to an ink composition containing the composition, an image-forming method and an image-forming apparatus using the composition, and a recording medium applying the composition. Further, the present invention relates to an ABC type block polymer compound wherein the polymer is an ABC type triblock polymer, and wherein at least one of the blocks in the triblock polymer changes in nature from solvophilic to solvophobic or from solvophobic to solvophilic in response to stimuli, and more preferably, the A component, then the B component, and finally the C component respond to the stimuli.
    Type: Application
    Filed: March 1, 2006
    Publication date: July 6, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Koichi Sato, Ikuo Nakazawa, Sakae Suda, Masayuki Ikegami, Sadahito Aoshima, Shinji Sugihara
  • Publication number: 20060146087
    Abstract: A novel liquid composition set is provided for forming an image or pattern by functional substances such as a colorant without causing blurring. Each of the liquid compositions of the set comprises a functional substance, an amphiphilic block copolymer or graft copolymer having an organic acid group, and a liquid medium, wherein the organic acid groups of the copolymers are different in pKa, and the amphiphilic polymer contained in the first liquid composition becomes viscous by pH change on contact with the second liquid composition different in pH from the first liquid composition.
    Type: Application
    Filed: May 25, 2004
    Publication date: July 6, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Koichi Sato, Ikuo Nakazawa, Sakae Suda, Masayuki Ikegami, Keiichiro Tsubaki, Ryuji Higashi, Keiko Yamagishi
  • Patent number: 7067590
    Abstract: The present invention relates to a stimuli-responsive composition that comprises a polymer, a solvent and a substance having a predetermined function. One embodiment of the present invention is a composition comprising a block polymer, a solvent and a substance having a predetermined function. The present invention also relates to an ink composition containing the composition, an image-forming method and an image-forming apparatus using the composition, and a recording medium applying the composition. Further, the present invention relates to an ABC type block polymer compound wherein the polymer is an ABC type triblock polymer, and wherein at least one of the blocks in the triblock polymer changes in nature from solvophilic to solvophobic or from solvophobic to solvophilic in response to stimuli, and more preferably, the A component, then the B component, and finally the C component respond to the stimuli.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: June 27, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Sato, Ikuo Nakazawa, Sakae Suda, Masayuki Ikegami, Sadahito Aoshima, Shinji Sugihara
  • Publication number: 20060128828
    Abstract: Disclosed herein is an amphiphilic block copolymer having an ionic functional group, wherein the ratio (N10/N5) of a rotational viscosity (N10) of a 10% by mass solution of the copolymer in purified water to a rotational viscosity (N5) of a 5% by mass solution of the copolymer in purified water is 2.5 or lower.
    Type: Application
    Filed: January 14, 2005
    Publication date: June 15, 2006
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Koichi Sato, Ryuji Higashi, Masayuki Ikegami, Keiichiro Tsubaki, Ikuo Nakazawa, Sakae Suda, Keiko Yamagishi, Takeshi Okada, Kohei Watanabe
  • Patent number: 7056972
    Abstract: The present invention relates to a stimuli-responsive composition that contains a polymer, a solvent and a substance having a predetermined function. One embodiment of the composition contains a block polymer, a solvent and a substance having a predetermined function. Preferably, the solvent in the composition is water; and the polymer in the composition has a polyvinyl ether structure. The composition has superior dispersion stability. The present invention also relates to an ink composition containing the composition, an image-forming method and an image-forming apparatus using the ink composition, and a recording medium having the composition.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: June 6, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ikuo Nakazawa, Koichi Sato, Sakae Suda, Masayuki Ikegami
  • Patent number: 7044592
    Abstract: An image forming process provides an excellent ink fixation effect for high speed, low energy consumption printing. Two-valued or multi-valued gradation expression of a picture element, or the smallest output unit, is realized by controlling the number of liquid droplets impacting on a recording medium for each dot formed on the recording medium. The liquid droplets are subjected to physical or chemical modification so as to be fixed to the recording medium. The present invention is also directed to an image forming apparatus, an ink for liquid droplet recording and a liquid droplet ejection and projection method that can use the image forming process.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: May 16, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Sato, Hidemasa Mizutani, Kazuharu Katagiri, Yukio Hanyu, Hirokatsu Miyata, Ikuo Nakazawa, Miki Ogawa, Tomonari Horikiri, Masayuki Ikegami
  • Publication number: 20060100310
    Abstract: In an image forming method in which at least two kinds of ink compositions are applied onto a recording medium to form an image on the recording medium, the image forming method has the steps of providing a first ink composition containing a solvent, a coloring material and a block polymer having at least an anionic block segment for dispersing the pigment in the solvent, and a second ink composition containing a solvent, a dye and a polyvalent metal ion having reactivity with the block polymer; and applying the first ink composition and the second ink composition onto the recording medium to bring the first ink composition into contact with the second ink composition.
    Type: Application
    Filed: December 21, 2005
    Publication date: May 11, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Ikuo Nakazawa, Koichi Sato, Ryuji Higashi, Sakae Suda, Masayuki Ikegami, Keiichiro Tsubaki, Keiko Yamagishi, Youhei Miyauchi, Tomoya Oku