Teijin Petrochemical Industries, Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5177287 Catalyst composition, process for cracking non-aromatic hydrocarbons and process for isomerizing C.sub.8 aromatic hydrocarbonsExpiredOct 31, 91Jan 05, 93[C07C]
5089459 Catalyst composition, process for cracking non-aromatic hydrocarbons and process for isomerizing C.sub.8 aromatic hydrocarbonsExpiredMar 27, 90Feb 18, 92[B01J]
5032561 Catalyst composition for cracking non-aromatic hydrocarbons and isomerizing C8-aromatic hydrocarbonsExpiredSep 28, 89Jul 16, 91[B01J]
4954326 Preparation of crystalline aluminosilicate zeolite, and its productExpiredJul 12, 89Sep 04, 90[C01B]
4902843 Process for producing M-xylene from O-xyleneExpiredOct 04, 88Feb 20, 90[C07C]
4760165 Recovering useful components at least containing dimethyl terephthalate from high-boiling byproducts occurring in the production of dimethyl terephthalateExpiredNov 10, 86Jul 26, 88[C07C]
4716245 Process for producing 2,6-naphthalenedicarboxylic acidExpiredApr 18, 86Dec 29, 87[C07C]
4709088 Process for producing 2,6-naphthalene-dicarboxylic acidExpiredJul 15, 86Nov 24, 87[C07C]
4700012 Process for isomerizing xyleneExpiredDec 30, 86Oct 13, 87[C07C]
4695667 Novel crystalline aluminosilicate zeolites and process for production thereofExpiredFeb 26, 85Sep 22, 87[C07C]
4557919 Production of crystalline zeolitesExpiredApr 10, 84Dec 10, 85[C01B]
4524055 Crystalline aluminosilicate zeolite and process for production thereofExpiredFeb 22, 83Jun 18, 85[C01B, B01J]
4485185 Catalyst compositionExpiredSep 15, 83Nov 27, 84[B01J]
4377718 Process for producing p-xyleneExpiredJul 21, 81Mar 22, 83[C07C]
4331822 Isomerization of xyleneExpiredMar 25, 80May 25, 82[C07C]
4320242 Process for selective dealkylation of alkyl-substituted aromatic hydrocarbonsExpiredFeb 04, 80Mar 16, 82[C07C]
4300014 Process for isomerization of xyleneExpiredNov 04, 80Nov 10, 81[C07C]

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