HOECHST CELANESE CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM6151
 
  
 
C08F MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS 5120
 
  
 
C07C ACYCLIC OR CARBOCYCLIC COMPOUNDS 4134
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 3202
 
  
 
D02G CRIMPING OR CURLING FIBRES, FILAMENTS, YARNS, OR THREADS; YARNS OR THREADS227
 
  
 
G03F PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR 2102
 
  
 
A01H NEW PLANTS OR PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES 1127
 
  
 
A61B DIAGNOSIS; SURGERY; IDENTIFICATION 1239
 
  
 
A63B APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT 166
 
  
 
B01D SEPARATION 1133

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5972808 Fibrous structures with fine particlesJan 30, 97Oct 26, 99[B32B]
5952092 Fibrous structures with labile active substanceJan 30, 97Sep 14, 99[B32B]
5952120 Method of making a trilayer battery separatorApr 15, 97Sep 14, 99[H01M]
5897950 Fibrous additive for asphalt paving compositionsMay 14, 97Apr 27, 99[D02G]
5866769 Soybean cultivar 1573379Apr 07, 97Feb 02, 99[C12N, A01H]
5779847 Process for high performance, permeable fibrous structureApr 22, 96Jul 14, 98[B32B]
5744648 Process for the manufacture of 1, 3-cyclohexanedioneAug 01, 96Apr 28, 98[C07C]
5709926 Reclaimable transparencies for plain paper copiersJul 18, 96Jan 20, 98[G03G, B32B]
5674339 Process for fibrous structure containing immobilized particulate matterAug 02, 94Oct 07, 97[A63B]
5662728 Particulate filter structureDec 31, 92Sep 02, 97[B01D]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6090516 Polyester toner composition for electrophotographic imaging systemsExpiredOct 04, 99Jul 18, 00[G03G]
6090973 Polyester toner composition for electrophotographic imaging systemsExpiredOct 04, 99Jul 18, 00[C07C]
6057061 Ethylene-vinyl alcohol copolymer battery separatorExpiredNov 13, 97May 02, 00[H01M]
6052261 Method for manufacturing magnetoresistance headExpiredJun 24, 96Apr 18, 00[G11B]
5994560 Resolution of racemic mixtures using polymers containing chiral unitsExpiredAug 29, 96Nov 30, 99[C07D, C07C, C07B]
5869025 Tripodal aromatic heterocycle carboxamide MRI contrast agentsExpiredAug 21, 97Feb 09, 99[A61K, C07D, A61B]
5869026 Tripodal carboxamide ligands for MRI contrast agentsExpiredAug 21, 97Feb 09, 99[A61K, C07D, A61B]
5863622 Polarizer laminates comprising coextruded liquid crystal polymer moieties and integral thermoplastic cover layersExpiredDec 05, 96Jan 26, 99[G02F]
5861138 Ligands for MRI contrast agentExpiredNov 20, 96Jan 19, 99[A61K, A61M]
5861140 Tripodal paramagnetic contrast agents for MR imagingExpiredNov 20, 96Jan 19, 99[A61K, C07D, A61B]
5858329 MRI diagnostic procedures using tripodal pyridinyl metal complexesExpiredAug 21, 97Jan 12, 99[A61K, C07D, A61B]
5851423 Liquid crystal display devices incorporating polarizers comprising liquid crystal polymersExpiredMay 22, 97Dec 22, 98[C09K, G02F]
5840464 Single coating transfer color proofing systemExpiredJun 14, 95Nov 24, 98[G03C, C03F]
5837872 Process for preparation of N-acyl-aminodiacidsExpiredNov 13, 95Nov 17, 98[C07C]
5831087 Macrocyclic imide compoundsExpiredMar 02, 94Nov 03, 98[C07D]
H001760 Process for glycol esters of an alkali metal salt of 5-sulfoisophthalic acidExpiredJan 08, 97Nov 03, 98[C07L]
5827611 Multilayered thermoplastic article with special propertiesExpiredMar 10, 97Oct 27, 98[D02G]
5824288 Thio-substituted pyridines as MRI ligand precursorsExpiredAug 21, 97Oct 20, 98[A61K, C07F, C07D]
5820851 Tripodal pyridine ligands as MRI contrast agentsExpiredAug 21, 97Oct 13, 98[A61K, C07F, C07D, A61B]
5814711 Polymerization medium to prepare multi-block copolymersExpiredDec 05, 96Sep 29, 98[C08L]

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