DAIREN CHEMICAL CORPORATION

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Technologies

Intl Class Technology # of Patents/ App Rank in Class
 
 
 
B01J CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 390
 
 
 
C07C ACYCLIC OR CARBOCYCLIC COMPOUNDS 3122
 
 
 
C07D HETEROCYCLIC COMPOUNDS 3142
 
 
 
C08G MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS 297
 
 
 
B28B SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER 121
 
 
 
D02G CRIMPING OR CURLING FIBRES, FILAMENTS, YARNS, OR THREADS; YARNS OR THREADS127

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7,265,243 Catalytic oxacylation vapor phase processMar 01, 04Sep 04, 07[C07C]
6,998,461 Modified polyester fiber and process for producing the sameJun 12, 03Feb 14, 06[C08G]
6,350,883 Method for preparing lactamNov 22, 00Feb 26, 02[C07D]
6,323,347 Catalyst for preparing lactone and a method for preparing lactoneDec 15, 00Nov 27, 01[C07D, B01J]
6,313,262 Method for preparing polyether polyol and copolymer thereofNov 23, 99Nov 06, 01[C08G]
6,303,536 Process of preparing catalyst for producing alkenyl acetatesAug 16, 99Oct 16, 01[B01J]
5,916,677 Process for producing polyester fiber having improved dyeability, elongation and strength, and polyester fiber therefromSep 11, 98Jun 29, 99[D02G, B28B]
5,917,061 Process for producing cyclic ethers by liquid phase reactionApr 28, 98Jun 29, 99[C07D]
5,888,923 Modified Raney nickel catalyst and a process for preparing diols by using the sameApr 15, 96Mar 30, 99[B01J]
5,426,250 Process for preparing 1,4-butanediolMay 03, 94Jun 20, 95[C07C]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Filing Date Issue/Pub Date Intl Class
2003/0148,882 CATALYST FOR OXACYLATION AND USE OF THE SAMEDec 03, 99Aug 07, 03[B01J]
2002/0120,154 Method for preparing lactamDec 14, 01Aug 29, 02[C07D]
5,227,564 Process for the preparation of tertiary olefinsDec 09, 91Jul 13, 93[C07C]
5,144,062 Process for producing methyl formateSep 07, 90Sep 01, 92[C07C]
4,999,177 Process for the preparation of high purity carbon monoxideApr 10, 89Mar 12, 91[C01B]
4,866,179 Process for the manufacture of pyridine in high yield and selectivity during a prolonged period of operationJun 06, 88Sep 12, 89[C07D]

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