Assignee
HODOGAYA CHEMICAL CO LTD
239 granted patents·82 pending applications·2,085 citations·filing 1973–2025
Top patents by PatentIndex Score
321 records- 0197US7759030B2P-terphenyl compound and photosensitive body for electrophotography using such compoundHODOGAYA CHEMICAL CO LTD·Filed 2009·Granted Jul 20, 2010·41 cites·3 claims
- 0295US7799492B2P-terphenyl compound and photosensitive body for electrophotography using such compoundHODOGAYA CHEMICAL CO LTD·Filed 2005·Granted Sep 21, 2010·22 cites·14 claims
- 0395US5707747AAmine compound and electro-luminescence device comprising sameHODOGAYA CHEMICAL CO LTD·Filed 1996·Granted Jan 13, 1998·170 cites·5 claims
- 0495US4624907AElectrophotographic toner containing metal complexHODOGAYA CHEMICAL CO LTD·Filed 1984·Granted Nov 25, 1986·83 cites·4 claims
- 0594US5639914ATetraaryl benzidinesHODOGAYA CHEMICAL CO LTD·Filed 1994·Granted Jun 17, 1997·325 cites·6 claims
- 0694US4780553AElectrophotographic toner and compounds useful for the tonerHODOGAYA CHEMICAL CO LTD·Filed 1987·Granted Oct 25, 1988·63 cites·7 claims
- 0794US4683188AElectrophotographic toner containing metal complex charge control agentHODOGAYA CHEMICAL CO LTD·Filed 1986·Granted Jul 28, 1987·62 cites·5 claims
- 0893US6316577B1Electrophotographic photoconductor and aromatic polycarbonate resin for use thereinHODOGAYA CHEMICAL CO LTD·Filed 2000·Granted Nov 13, 2001·34 cites·22 claims
- 0991US11056653B2Organic electroluminescence deviceHODOGAYA CHEMICAL CO LTD·Filed 2017·Granted Jul 6, 2021·5 cites·15 claims
- 1091US10818844B2Organic electroluminescent deviceHODOGAYA CHEMICAL CO LTD·Filed 2015·Granted Oct 27, 2020·7 cites·13 claims
- 1190US9123897B2Benzotriazole derivatives and organic electroluminescent devices using the derivativesHODOGAYA CHEMICAL CO LTD·Filed 2012·Granted Sep 1, 2015·15 cites·12 claims
- 1289US4960849APolyurethane from a copolyether of tetrahydrofuran and 3-alkyl tetrahydrofuranHODOGAYA CHEMICAL CO LTD·Filed 1988·Granted Oct 2, 1990·41 cites·14 claims
- 1389US4878942ABenzamide derivative, process for its production and plant growth regulantHODOGAYA CHEMICAL CO LTD·Filed 1988·Granted Nov 7, 1989·57 cites·4 claims
- 1489US4510513AHeat sensitive record sheetHODOGAYA CHEMICAL CO LTD·Filed 1983·Granted Apr 9, 1985·32 cites·4 claims
- 1589US4507430AWater-base polyurethane emulsionHODOGAYA CHEMICAL CO LTD·Filed 1984·Granted Mar 26, 1985·68 cites·11 claims
- 1689US4433040AElectrophotographic toner containing a metal complex dyeHODOGAYA CHEMICAL CO LTD·Filed 1981·Granted Feb 21, 1984·45 cites·4 claims
- 1788US11706943B2Organic electroluminescent element and method for producing sameHODOGAYA CHEMICAL CO LTD·Filed 2018·Granted Jul 18, 2023·3 cites·4 claims
- 1886US3975285ALiquid crystal compositionHODOGAYA CHEMICAL CO LTD·Filed 1973·Granted Aug 17, 1976·29 cites·11 claims
- 1983US4521605ACarbazole compounds and process for preparing the sameHODOGAYA CHEMICAL CO LTD·Filed 1982·Granted Jun 4, 1985·16 cites·10 claims
- 2083US3936564APressure-sensitive copying paper containing lactone compounds of pyridine-carboxylic acidHODOGAYA CHEMICAL CO LTD·Filed 1974·Granted Feb 3, 1976·13 cites·2 claims
- 2182US10505119B2Organic electroluminescence deviceHODOGAYA CHEMICAL CO LTD·Filed 2016·Granted Dec 10, 2019·3 cites·11 claims
- 2282US10474050B2Toner and charge control agent using pyrazolone derivative or salt of derivativeHODOGAYA CHEMICAL CO LTD·Filed 2016·Granted Nov 12, 2019·3 cites·4 claims
- 2382US10276800B2Organic electroluminescence device having at least an a node, a hole injection layer, a first hole transport layer. A second hole transport layer a luminous layer, an electron transport layer, and a cathodeHODOGAYA CHEMICAL CO LTD·Filed 2015·Granted Apr 30, 2019·2 cites·9 claims
- 2482US10032995B2Compound having diazatriphenylene ring structure, and organic electroluminescent deviceHODOGAYA CHEMICAL CO LTD·Filed 2014·Granted Jul 24, 2018·3 cites·16 claims
- 2582US8053092B2m-carbazolylphenyl compoundsHODOGAYA CHEMICAL CO LTD·Filed 2006·Granted Nov 8, 2011·9 cites·13 claims
- 2682US7709172B2Oxidized mixed cyclic phenol sulfides, and charge control agents and toners using the sameHODOGAYA CHEMICAL CO LTD·Filed 2008·Granted May 4, 2010·6 cites·8 claims
- 2782US6919419B2Aromatic block polycarbonate resin, diphenol compound for preparation of the polycarbonate resin, electro-photographic photoconductor, electro-photographic image forming apparatus and process, and process cartridgeHODOGAYA CHEMICAL CO LTD·Filed 2003·Granted Jul 19, 2005·19 cites·11 claims
- 2882US5889088AComposite particle aqueous suspension and process for producing sameHODOGAYA CHEMICAL CO LTD·Filed 1997·Granted Mar 30, 1999·59 cites·22 claims
- 2982US4284813ABenzamide derivatives and herbicidal composition containing the sameHODOGAYA CHEMICAL CO LTD·Filed 1979·Granted Aug 18, 1981·15 cites·1 claims
- 3081US11158813B2Organic electroluminescent deviceHODOGAYA CHEMICAL CO LTD·Filed 2018·Granted Oct 26, 2021·2 cites·5 claims
- 3181US7402369B2Mono azo iron complex compound, and charge controlling agent and toner using the sameHODOGAYA CHEMICAL CO LTD·Filed 2006·Granted Jul 22, 2008·5 cites·10 claims
- 3280US11925108B2Compound having triarylamine structure and organic electroluminescence deviceHODOGAYA CHEMICAL CO LTD·Filed 2019·Granted Mar 5, 2024·1 cites·7 claims
- 3380US11437583B2Organic electroluminescence device that includes compound having benzoazole structureHODOGAYA CHEMICAL CO LTD·Filed 2018·Granted Sep 6, 2022·2 cites·8 claims
- 3480US9525140B2Arylamine compound useful in an organic electroluminescent deviceHODOGAYA CHEMICAL CO LTD·Filed 2013·Granted Dec 20, 2016·3 cites·8 claims
- 3579US11605785B2Organic electroluminescence deviceHODOGAYA CHEMICAL CO LTD·Filed 2018·Granted Mar 14, 2023·2 cites·6 claims
- 3679US10326079B2Organic electroluminescent deviceHODOGAYA CHEMICAL CO LTD·Filed 2016·Granted Jun 18, 2019·3 cites·20 claims
- 3779US8673792B2p-Terphenyl compound mixture and electrophotographic photoreceptors made by using the sameHODOGAYA CHEMICAL CO LTD·Filed 2013·Granted Mar 18, 2014·2 cites·1 claims
- 3879US4300992AActivated cathodeHODOGAYA CHEMICAL CO LTD·Filed 1976·Granted Nov 17, 1981·29 cites·12 claims
- 3978US11283026B2Compound having tetraazatriphenylene ring structure, light-emitting material, and organic electroluminescent deviceHODOGAYA CHEMICAL CO LTD·Filed 2015·Granted Mar 22, 2022·2 cites·14 claims
- 4077US7955699B2Composite materialHODOGAYA CHEMICAL CO LTD·Filed 2006·Granted Jun 7, 2011·4 cites·11 claims
- 4177US7901858B2Mixed cyclic phenol sulfides, and charge control agents and toners using the sameHODOGAYA CHEMICAL CO LTD·Filed 2008·Granted Mar 8, 2011·5 cites·3 claims
- 4277US7824768B2Carbon fibrous structureHODOGAYA CHEMICAL CO LTD·Filed 2006·Granted Nov 2, 2010·11 cites·7 claims
- 4377US5413891AElectrostatic image developing tonerHODOGAYA CHEMICAL CO LTD·Filed 1994·Granted May 9, 1995·23 cites·4 claims
- 4477US3993699AProcess for producing xylylene glycolsHODOGAYA CHEMICAL CO LTD·Filed 1975·Granted Nov 23, 1976·14 cites·9 claims
- 4577US2024260457A1Organic el device, amine compound having benzazole ring structure, and method in which said amine compound is used in capping layer of organic el deviceHODOGAYA CHEMICAL CO LTD·Filed 2024·Application pending·0 cites
- 4676US7820832B2Oxidized mixed cyclic phenol sulfides, and charge control agents and toners using the sameHODOGAYA CHEMICAL CO LTD·Filed 2009·Granted Oct 26, 2010·4 cites·8 claims
- 4776US3983058AProcess for preparing polyurethane emulsionsHODOGAYA CHEMICAL CO LTD·Filed 1974·Granted Sep 28, 1976·22 cites·9 claims
- 4875US7867632B2Arylamine compound and organic electroluminescence deviceHODOGAYA CHEMICAL CO LTD·Filed 2006·Granted Jan 11, 2011·2 cites·10 claims
- 4975US4385927ABenzamide derivatives and herbicidal composition containing the sameHODOGAYA CHEMICAL CO LTD·Filed 1980·Granted May 31, 1983·11 cites·4 claims
- 5074US11997870B2Organic electroluminescent element and method for producing sameHODOGAYA CHEMICAL CO LTD·Filed 2023·Granted May 28, 2024·0 cites·11 claims
Showing the top 50 of 321 patent records by PatentIndex Score.
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