Patents Assigned to PERMACHEM ASIA
  • Charge-transfer material and process for producing the same, electron-transfer agent, photoreceptor for electrophotography and organic electroluminescence element using said charge-transfer material
    Patent number: 7195851
    Abstract: A photosensitive layer contains an electron-transfer agent that makes use of a compound represented by the following general formula (1): wherein R1 through R4 are each independently selected from the group consisting of hydrogen, cyano, nitro, halogen, hydroxyl, alkyl, aryl, heterocyclic ring, ester, alkoxy, aralkyl, allyl, amide, amino, acyl, alkenyl, alkynyl, carboxyl, carbonyl, and carboxylic acid; X is selected from the group consisting of oxygen, sulfur, and ?C(CN)2; and W is a 4- to 8-membered ring.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: March 27, 2007
    Assignees: Yamanashi Electronics Co., Ltd., Permachem Asia, Ltd.
    Inventors: Yasuyuki Kiuchi, Toyozoh Satoh, Hitoshi Takahashi, Hiroki Suzuki, Mitsuyo Momose
  • Charge-transfer material and process for producing the same, electron-transfer agent, photoreceptor for electrophotography and organic electroluminescence element using said charge-transfer material
    Publication number: 20060134539
    Abstract: A photosensitive layer contains an electron-transfer agent that makes use of a compound represented by the following general formula (1): wherein R1 through R4 are each independently selected from the group consisting of hydrogen, cyano, nitro, halogen, hydroxyl, alkyl, aryl, heterocyclic ring, ester, alkoxy, aralkyl, allyl, amide, amino, acyl, alkenyl, alkynyl, carboxyl, carbonyl, and carboxylic acid; X is selected from the group consisting of oxygen, sulfur, and ?C(CN)2; and W is a 4- to 8-membered ring.
    Type: Application
    Filed: November 30, 2005
    Publication date: June 22, 2006
    Applicants: PERMACHEM ASIA, SHINDENGEN ELECTRIC MANUFACTURING CO., LTD., YAMANASHI ELECTRONICS CO., LTD.
    Inventors: Yasuyuki Kiuchi, Toyozoh Satoh, Hitoshi Takahashi, Hiroki Suzuki, Mitsuyo Momose
  • Charge-transfer material and process for producing the same, electron-transfer agent, photoreceptor for electrophotography and organic electroluminescence element using said charge-transfer material
    Publication number: 20040142261
    Abstract: A photosensitive layer contains an electron-transfer agent that makes use of a compound represented by the following general formula (1): 1
    Type: Application
    Filed: September 30, 2003
    Publication date: July 22, 2004
    Applicants: PERMACHEM ASIA, LTD., SHINDENGEN ELECTRIC MANUFACTURING CO., LTD., YAMANASHI ELECTRONICS CO., LTD.
    Inventors: Yasuyuki Kiuchi, Toyozoh Satoh, Hitoshi Takahashi, Tomoko Kitsunai, Hiroki Suzuki, Mitsuyo Momose
  • Production of dibromonitro compound
    Patent number: 4723044
    Abstract: A process for producing a dibromonitro compound represented by the general formula ##STR1## wherein R represents a hydrogen atom or a methyl group, which comprises condensing nitromethane with formaldehyde or acetaldehyde in the presence of an alkali, the amount of the aldehyde being at least 1.5 moles per mole of nitromethane; and thereafter without isolating the product, treating the reaction mixture with bromine to brominate the product.
    Type: Grant
    Filed: June 13, 1986
    Date of Patent: February 2, 1988
    Assignee: Permachem Asia, Ltd.
    Inventors: Michio Watanabe, Kiyoshi Ishii, Mie Namiki, Takeshi Fukuda