1
Kumiko Mafune, Tsuyoshi Eida, Keiichi Murai, Yoshifumi Hattori, Mayumi Yamamoto, Osamu Nishiwaki, Yoshihisa Takizawa, Takao Yamamoto, Akira Nagashima, Masahiko Tonogaki, Shinichi Sato, Ryuji Katsuragi, Mikio Sanada, Hisashi Teraoka, Eriko Saito: Ink, and ink-jet recording method and instrument using the same. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, September 19, 1995: US05451251 (85 worldwide citation)

Disclosed herein is an ink comprising a coloring material and a liquid medium dissolving the coloring material therein, wherein the ink comprises a dye having at least one ammonium ion as a counter ion and an ammonium salt of an inorganic or organic acid.


2
Koichi Osumi, Yoshifumi Hattori, Yoshihisa Takizawa, Ryuji Katsuragi, Hisashi Teraoka: Water-based pigment ink, and ink-jet recording method and instruments using the same. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, November 2, 1999: US05976233 (75 worldwide citation)

Disclosed herein is a water-based pigment ink comprising a coloring material composed of self-dispersing carbon black obtained by bonding at least one hydrophilic group directly or through another atomic group to the surface of carbon black, a humectant of the general formula


3
Ryuji Katsuragi, Koromo Shirota, Teruo Ozaki, Masahiko Kubota, Hidehiko Kanda: Ink set for ink-jet recording, ink-jet recording method, recording unit, ink-jet recording apparatus and bleeding reducing method. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, October 8, 2002: US06460987 (19 worldwide citation)

An ink set for use in an ink-jet recording method for recording a color image on a recording medium using four colors or more of ink, each ink includes a coloring material and a liquid medium, wherein any combination of two different inks causes aggregation of the coloring material by a chemical rea ...


4
Ryuji Katsuragi, Mayumi Yamamoto, Hisashi Teraoka: Image forming process employing liquid composition and ink in combination. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, August 28, 2001: US06281917 (18 worldwide citation)

Provided is a process for the formation of an image employing a liquid composition and a colored ink in combination to form a colored image on a recording medium, comprising using at least a magenta ink as the colored ink, wherein said magenta ink provides an image of magenta color, which satisfies ...


5
Ryuji Katsuragi, Makoto Shioya: Liquid composition, ink set for ink-jet recording, ink-jet recording process, recording unit and ink-jet recording apparatus. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, April 22, 2003: US06550903 (13 worldwide citation)

The invention provides liquid compositions, ink sets for ink-jet recording, ink-jet recording processes, recording units and ink-jet recording apparatus for providing high-quality images with lessened bleeding. The invention also provides liquid compositions, ink sets for ink-jet recording, ink-jet ...


6
Ryuji Katsuragi, Makoto Shioya: Cleaning ink-jet recording head with liquid composition. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, August 12, 2003: US06604809 (13 worldwide citation)

A liquid composition for cleaning and removing koga on a heater formed after long-term use of an ink-jet recording head, or contaminants introduced during manufacture of the ink-jet recording head is provided. The liquid composition includes an effective amount of a cleaner to clean an ink-jet recor ...


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Teruo Ozaki, Koromo Shirota, Masahiko Kubota, Ryuji Katsuragi, Hidehiko Kanda: Ink jet recording head substrate, ink jet recording head, ink jet recording unit, and ink jet recording apparatus. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, August 20, 2002: US06435660 (13 worldwide citation)

To provide an ink jet recording head substrate, an ink jet recording head, an ink jet recording unit, and an ink jet recording apparatus which allow scorch deposits on a heating section to be prevented by exerting on the section effect of providing super-hydrophilicity. The ink jet recording head su ...


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Eriko Saito, Mayumi Yamamoto, Ryuji Katsuragi: Ink, and ink-jet recording method and instruments using the same. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, March 17, 1998: US05728201 (12 worldwide citation)

Disclosed herein is a yellow ink comprising at least two yellow dyes and a liquid medium dissolving or dispersing the dyes therein, wherein the ink comprises a dye represented by the following general formula (1) in the state of a free acid, and a yellow dye having a SO.sub.3 H group as a main solub ...


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Ryuji Katsuragi, Makoto Shioya, Hideto Yokoi: Liquid composition, ink for ink-jet, ink set for ink-jet recording, ink-jet recording method, recording unit, ink cartridge, and ink-jet recording apparatus. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, December 7, 2004: US06827434 (12 worldwide citation)

A liquid composition for ink-jet recording, or an ink set for ink-jet recording which produces an image having water resistance and excellent print quality, and which can reduce color bleeding that occurs in formation of color images, and furthermore, which can extend a life-span of ink-jet recordin ...


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Ryuji Katsuragi, Makoto Shioya, Hideto Yokoi: Liquid composition, ink for ink-jet, ink set for ink-jet recording, ink-jet recording method, recording unit, ink cartridge, and ink jet recording apparatus. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, August 19, 2003: US06607266 (11 worldwide citation)

A liquid composition for ink-jet recording, or an ink set for ink-jet recording which produces an image having water resistance and excellent print quality, and which can reduce color bleeding that occurs in formation of color images, and furthermore, which can extend a life-span of ink-jet recordin ...