Kawasaki Kasei Chemicals Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C07C ACYCLIC OR CARBOCYCLIC COMPOUNDS 3135
 
  
 
C25B ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR 332
 
  
 
C01B NON-METALLIC ELEMENTS; COMPOUNDS THEREOF277
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 253
 
  
 
C12Q MEASURING OR TESTING PROCESSES INVOLVING ENZYMES OR MICRO-ORGANISMS 1124
 
  
 
C22B PRODUCTION OR REFINING OF METALS 127
 
  
 
D21C PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR127

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7279607 Process for producing anthracene dietherDec 19, 02Oct 09, 07[C07C]
7056418 Cooking method for pulpDec 17, 01Jun 06, 06[D21C]
6585880 Method for recovering chemicals in a process of producing pulp by kraft processNov 28, 01Jul 01, 03[C02F]
6517699 Method for producing polysulfides by means of electrolytic oxidationAug 27, 01Feb 11, 03[C12Q, C25B, C02F]
6264819 Method for producing polysulfide by electrolytic oxidationJan 28, 00Jul 24, 01[C01B, C25B]
5972197 Method for producing polysulfides by electrolytic oxidationDec 23, 97Oct 26, 99[C01B, C25B]
5750743 Method for preparing a solution of an alkali salt of anthrahydroquinoneDec 12, 96May 12, 98[C07C]
5474593 Agent for treating metal ions in an aqueous solution, process for producing the metal ion-treating agent and method for treating metal ions in an aqueous solutionSep 08, 94Dec 12, 95[C22B]
5225578 2-(1-alkylaminoalkyl)-3-hydroxy-1,4-naphthoquinone, process for its production and processes for producing 2-(1-alkenyl)-3-hydroxy-1,4-naphthoquinone and 2-alkyl-3-acyloxy-1,4-naphthoquinone by using itFeb 18, 92Jul 06, 93[C07C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2009/0242,422 Method for recovering performance of electrolyzer for use in production of polysulfide and method for stopping holding electrolyzerAbandonedMar 31, 09Oct 01, 09[C25B]
6106589 Method for treating noble metal complex ionsExpiredAug 12, 97Aug 22, 00[C22B]
5834608 Method for producing copper phthalocyanine in a reaction medium containing sulfurExpiredMay 30, 96Nov 10, 98[C07D, C09B]
5702615 Method for the treatment of waste waterExpiredJun 24, 96Dec 30, 97[C02F]
5496939 Method for producing copper phthalocyanine using thiolsExpiredMar 08, 95Mar 05, 96[C09B]
5153314 Process for producing a copper phthalocyanine compoundExpiredOct 31, 90Oct 06, 92[C07D, C09B]
5153339 Process for separation of naphthoquinone and phthalic acidExpiredJun 25, 82Oct 06, 92[C07C]
4980489 2-(1-alkylaminoalkyl)-3-hydroxy-1,4-naphthoquinoneExpiredFeb 15, 89Dec 25, 90[C07C]
4906747 Process for producing a metal phthalocyanine and/or its derivativeExpiredDec 15, 88Mar 06, 90[C07D, C09B]
4840932 Catalyst for producing 1,4-naphthoquinoneExpiredMar 16, 88Jun 20, 89[B01J]
4795604 Method for molding 1,4,4a,9a-tetrahydroanthraquinoneExpiredJun 10, 87Jan 03, 89[B29B]
4632782 Oxidizing an organic compoundExpiredApr 25, 84Dec 30, 86[C07C]
4561935 Process for removing anthraquinone type scaleExpiredJul 18, 84Dec 31, 85[C23G, D21C]
4536337 Process for the preparation of quinonesExpiredApr 04, 84Aug 20, 85[C07C]
4530745 Method for electrolyzing cerous sulfateExpiredJun 13, 84Jul 23, 85[C25B]
4481073 Process for removing anthraquinone type scaleExpiredNov 19, 81Nov 06, 84[C23G, D21C]
4467112 Process for producing p-n-alkylbenzoic acidExpiredJan 16, 80Aug 21, 84[C07C]
4450111 Process for the purification of anthraquinoneExpiredApr 29, 82May 22, 84[C07C]
4442176 Heat-sensitive recording sheetExpiredAug 19, 83Apr 10, 84[B41M]
4412954 Process for producing 1,4,4a,9a-tetrahydroanthraquinone compoundExpiredJul 14, 81Nov 01, 83[C07C]

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