Patents by Inventor Komei Kafuku
Komei Kafuku 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: 6720039Abstract: A liquid crystalline compound having a novel structure and a process for producing the same are provided. The liquid crystalline compound is represented by the following general formula (I): wherein R1 and R2 each independently represent a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon group having 1 to 22 carbon atoms and may be attached directly to the aromatic ring without through X1 or X2; R3 represents a hydrogen atom, a cyano group, a nitro group, a fluorine atom, or a methyl group; and X1 and X2 each independently represent an oxygen atom, a sulfur atom, or a —CO—, —OCO—, —COO—, —N═CH—, —CONH—, —NH—, —NHCO—, or —CH2— group.Type: GrantFiled: October 6, 2000Date of Patent: April 13, 2004Assignee: Dai Nippon Printing Co., Ltd.Inventors: Junichi Hanna, Masahiro Funahashi, Komei Kafuku, Kyoko Kogo
-
Publication number: 20010004107Abstract: The present invention relates to novel charge transfer materials which have both the advantageous properties of amorphous materials such as structural flexibility and uniformity over large areas, and those of crystalline materials such as molecular orientation and which are excellent in charge transferability, thin-film formability, and durability of various types.Type: ApplicationFiled: November 2, 1998Publication date: June 21, 2001Applicant: Junichi HannaInventors: JUNICHI HANNA, KYOKO KOGO, KOMEI KAFUKU
-
Patent number: 6224787Abstract: A novel liquid crystalline charge transport material is provided which simultaneously has advantages of an amorphous material, that is, evenness in a large area, and advantages of a crystalline material having molecular alignment, is excellent in high-quality charge transport capability, film forming properties, various types of durability and the like, and permits the alignment to be regulated by external stimulation. The liquid crystalline charge transport material has smectic liquid crystallinity and an electron mobility of not less than 1×10−5 cm2/v.s.Type: GrantFiled: March 6, 1998Date of Patent: May 1, 2001Assignee: Dai Nippon Printing Co., Ltd.Inventors: Junichi Hanna, Kyoko Kogo, Komei Kafuku
-
Patent number: 6174455Abstract: A liquid crystalline compound having a novel structure and a process for producing the same are provided. The liquid crystalline compound is represented by the following general formula (I): wherein R1 and R2 each independently represent a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon group having 1 to 22 carbon atoms and may be attached directly to the aromatic ring without through X1 or X2; R3 represents a hydrogen atom, a cyano group, a nitro group, a fluorine atom, or a methyl group; and X1 and X2 each independently represent an oxygen atom, a sulfur atom, or a —CO—, —OCO—, —COO—, —N═CH—, —CONH—, —NH—, —NHCO—, or —CH2— group.Type: GrantFiled: February 18, 1998Date of Patent: January 16, 2001Assignee: Dai Nippon Printing Co., Ltd.Inventors: Junichi Hanna, Masahiro Funahashi, Komei Kafuku, Kyoko Kogo
-
Patent number: 5607895Abstract: A thermal transfer sheet wherein a clear image having a sufficient density is formed in a thermal transfer process using a sublimable dye and wherein the formed image exhibits excellent fastnesses, particularly excellent light fastness.The thermal transfer sheet includes a base sheet and a dye-containing layer formed on one surface of the base sheet wherein a dye contained in the dye-containing layer includes a mixture of two or more specific dyes.Type: GrantFiled: August 3, 1994Date of Patent: March 4, 1997Assignee: Dai Nippon Printing Co., Ltd.Inventors: Hiroshi Eguchi, Komei Kafuku, Ryohei Takiguchi
-
Patent number: 5550098Abstract: An object of the present invention is to provide a thermal transfer sheet wherein a clear image having a sufficient density is formed in a thermal transfer process using a sublimable dye and wherein the formed image exhibits excellent fastnesses, particularly excellent light fastness.The present invention is directed to a thermal transfer sheet comprising a base sheet and a dye-containing layer formed on the one surface of the base sheet wherein a dye included in the dye-containing layer comprises a mixture of two or more specific dyes.Type: GrantFiled: March 30, 1994Date of Patent: August 27, 1996Assignee: Dai Nippon Printing Co., Ltd.Inventors: Kenichi Aso, Hideaki Sato, Hiroshi Eguchi, Komei Kafuku, Ryohei Takiguchi
-
Patent number: 5387686Abstract: A dyestuff for heat-sensitive transfer record is here disclosed which can be represented by the formula (1) ##STR1## wherein R.sub.1 is a hydrogen atom, alkyl group having 1 to 8 carbon atoms or cycloalkyl group; R.sub.2 is a hydrogen atom, halogen atom, alkoxy group which may be substituted, alkylthio group which may be substituted or arylthio group which may be substituted; R.sub.3 is a branched alkyl group having 3 to 5 carbon atoms, O-substituted oxycarbonyl group, N-substituted aminocarbonyl group in which an N-substituted group may form a ring, or a substituted or unsubstituted heterocyclic ring having two or more atoms of one or more kinds selected from the group consisting of a nitrogen atom, oxygen atom and sulfur atom; and when R.sub.1 is a hydrogen atom, R.sub.Type: GrantFiled: December 14, 1993Date of Patent: February 7, 1995Assignees: Mitsui Toatsu Chemicals, Incorporated, Dai Nippon Printing Co., Ltd.Inventors: Tsukasa Ohyama, Yasushi Shimokawa, Yoriaki Matsuzaki, Keisuke Takuma, Isamu Ghoda, Hitoshi Koshida, Ryohei Takiguchi, Hiroshi Eguchi, Komei Kafuku, Masayuki Nakamura
-
Patent number: 5369078Abstract: A thermal transfer sheet wherein a clear image having a sufficient density is formed in a thermal transfer process using a sublimable dye and wherein the formed image exhibits excellent fastnesses, particularly excellent light fastness.The thermal transfer sheet includes a base sheet and a dye-containing layer formed on one surface of the base sheet wherein a dye contained in the dye-containing layer includes a mixture of two or more specific dyes.Type: GrantFiled: November 13, 1992Date of Patent: November 29, 1994Assignee: Dai Nippon Printing Co., Ltd.Inventors: Hiroshi Eguchi, Komei Kafuku, Ryohei Takiguchi
-
Patent number: 5330960Abstract: A dye and a heat transfer sheet for use in a heat transfer printing method employing a sublimable dye, capable of producing an image which has a sufficiently high density and is excellent in sharpness, fastness properties and, in particular, resistance to light are provided. The dye has the following formula (I): ##STR1## The heat transfer sheet includes a substrate sheet, and a dye layer including the dye having formula (I), provided on one surface of the substrate sheet.Type: GrantFiled: May 21, 1992Date of Patent: July 19, 1994Assignee: Dai Nippon Printing Co., Ltd.Inventors: Masashi Ono, Shigeo Yasui, Ayashi Noguchi, Ryohei Takiguchi, Hiroshi Eguchi, Komei Kafuku
-
Patent number: 5304528Abstract: The heat transfer sheet according to this invention including a substrate sheet and a dye carrier layer formed on one side of the substrate sheet and includes a dye and a binder. The dye contained in the dye carrier layer includes a compound having two chromophores linked together through a divalent linking group, and is improved in terms of both color density and storability, thus producing excellent effects.Type: GrantFiled: February 17, 1993Date of Patent: April 19, 1994Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Jumpei Kanto, Hitoshi Saito, Komei Kafuku, Masayuki Nakamura, Hiroshi Eguchi
-
Patent number: 5296445Abstract: A dyestuff for heat-sensitive transfer record is here disclosed which can be represented by the formula (1) ##STR1## wherein R.sub.1 is a hydrogen atom, alkyl group having 1 to 8 carbon atoms or cycloalkyl group; R.sub.2 is a hydrogen atom, halogen atom, alkoxy group which may be substituted, alkylthio group which may be substituted or arylthio group which may be substituted; R.sub.3 is a branched alkyl group having 3 to 5 carbon atoms, O-substituted oxycarbonyl group, N-substituted aminocarbonyl group in which an N-substituted group may form a ring, or a substituted or unsubstituted heterocyclic ring having two or more atoms of one or more kinds selected from the group consisting of a nitrogen atom, oxygen atom and sulfur atom; and when R.sub.1 is a hydrogen atom, R.sub.Type: GrantFiled: August 5, 1992Date of Patent: March 22, 1994Assignees: Mitsui Toatsu Chemicals, Incorporated, Dai Nippon Printing Co., Ltd.Inventors: Tsukasa Ohyama, Yasushi Shimokawa, Yoriaki Matsuzaki, Keisuke Takuma, Isamu Ghoda, Hitoshi Koshida, Ryohei Takiguchi, Hiroshi Eguchi, Komei Kafuku, Masayuki Nakamura
-
Patent number: 5223476Abstract: The heat transfer sheet according to this invention including a substrate sheet and a dye carrier layer formed on one side of the substrate sheet and includes a dye and a binder. The dye contained in the dye carrier layer includes a compound having two chromophores linked together through a divalent linking group, and is improved in terms of both color density and storability, thus producing excellent effects.Type: GrantFiled: December 18, 1990Date of Patent: June 29, 1993Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Jumpei Kanto, Hitoshi Saito, Komei Kafuku, Masayuki Nakamura, Hiroshi Eguchi