RHODIA FIBER AND RESIN INTERMEDIATES

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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
 
  
 
C07D HETEROCYCLIC COMPOUNDS 3159
 
  
 
B01D SEPARATION 1133
 
  
 
B01J CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 1108

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7045656 Selective separation of iron by treatment with an ion-exchanging resin comprising diphosphonic acid groupsMay 17, 04May 16, 06[C07C]
6635151 Lactam dehydration methodMay 24, 01Oct 21, 03[B01D]
6518449 Method for regenerating a hydrogenation catalyst, method for hydrogenating compounds comprising nitrile functionsFeb 09, 01Feb 11, 03[B01J]
6479658 Method for cyclizing hydrolysis of an aminonitrile compound into lactamJun 04, 01Nov 12, 02[C07D]
6232488 Method for hydrogenating dinitrilesSep 19, 00May 15, 01[C07C]
6147256 Co/Cr catalyzyed oxidation of cyclohexaneApr 10, 98Nov 14, 00[C07C]
6100396 Method for purifying lactamsApr 23, 99Aug 08, 00[C07D]
6069246 Method for treating lactamsJul 27, 99May 30, 00[C07D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6884751 Production of hydrocyanation catalystsExpiredJun 22, 01Apr 26, 05[B01J]
6872369 Selective separation of iron by treatment with an ion-exchanging resin comprising diphosphonic acid groupsExpiredApr 23, 02Mar 29, 05[C07C, C01G, B01D]
6835830 Method for evaporating aminonitrileExpiredMay 07, 01Dec 28, 04[C07D]
6822117 Method for making adipic acidExpiredApr 22, 02Nov 23, 04[C07C]
6787669 Method for separating and purifying adipic acidExpiredNov 08, 00Sep 07, 04[C07C]
6677448 Method for reactivating a catalyst for cyclizing hydrolysis of an aminonitrile into a lactam and use of the regenerated catalyst for making lactamsExpiredJun 11, 01Jan 13, 04[B01J]
6613939 Purified sulfonated organophosphorus compounds and catalysis of organic reactions therewithExpiredJun 25, 01Sep 02, 03[C07C]
6563001 Method for separating and purifying carboxylic acid derived from the direct oxidation of a hydrocarbonExpiredJun 12, 01May 13, 03[C07C]
6559333 Method for purifying aliphatic aminonitrilesExpiredJan 25, 01May 06, 03[C07C]
6559339 Method for crystallizing carboxylic acidExpiredMay 31, 01May 06, 03[C07C]
6538156 Method for purifying adipic acid by crystallizationExpiredDec 04, 98Mar 25, 03[C07C]
6521779 Hemihydrogenation method for dinitrilesExpiredSep 25, 01Feb 18, 03[C07C]
6492525 Organometallic complexes comprising cationic heterocyclic carbenesExpiredJun 21, 01Dec 10, 02[C07F, C08F, C07C, B01J]
6482297 Method for distilling ammoniaExpiredJun 06, 01Nov 19, 02[C01C, C07D, B01D]
6478968 Method for filtering a three-phased reaction mixtureExpiredMar 17, 99Nov 12, 02[B01D]
6469194 Production of nitriles via hydrocyanation of ethylenically unsaturated organic compoundsExpiredJun 22, 01Oct 22, 02[C07C]
6417375 Furylphosphines and organometallic complexes containing themExpiredApr 13, 01Jul 09, 02[C07F]
6384283 Method for preparing aminonitrile and diamineExpiredJan 26, 01May 07, 02[C07C]
6372942 Pentenoic acid hydroxycarbonylation methodExpiredMar 17, 99Apr 16, 02[C07C]
2001/0042,843 Air content determinationAbandonedJan 29, 01Nov 22, 01[G01J]

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