UNION CAMP PATENT HOLDING, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
D21C PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR721
 
  
 
C09D COATING COMPOSITIONS, e.g. PAINTS, VARNISHES, LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR 191
 
  
 
G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR166

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5863389 Pulp bleaching reactor for dispersing high consistency pulp into a gaseous bleaching agent containing ozoneMar 08, 94Jan 26, 99[D21C]
5520783 Apparatus for bleaching high consistency pulp with ozoneJan 25, 93May 28, 96[D21C]
5472572 Reactor for bleaching high consistency pulp with ozoneJan 15, 92Dec 05, 95[D21C]
5409570 Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zoneNov 25, 92Apr 25, 95[D21C]
5363693 Recovery boiler leak detection system and methodAug 19, 92Nov 15, 94[G01M]
5174861 Method of bleaching high consistency pulp with ozoneAug 28, 91Dec 29, 92[D21C]
5164043 Environmentally improved process for bleaching lignocellulosic materials with ozoneAug 26, 91Nov 17, 92[D21C]
5164044 Environmentally improved process for bleaching lignocellulosic materials with ozoneAug 26, 91Nov 17, 92[D21C]
5104449 Water-soluable rosin-based coatings and inksAug 09, 91Apr 14, 92[C09D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6315861 Process for conditioning ozone gas recycle stream in ozone pulp bleachingExpiredAug 31, 00Nov 13, 01[D21C]
6126781 Process for conditioning ozone gas recycle stream in ozone pulp bleachingExpiredAug 01, 91Oct 03, 00[D21C]
5989388 Method for ozone bleaching of high consistency pulp in two stagesExpiredMar 08, 94Nov 23, 99[D21C]
5847266 Recovery boiler leak detection system and methodExpiredSep 13, 96Dec 08, 98[G01M, F22B, F22D]
5736004 Control scheme for rapid pulp delignification and bleachingExpiredJan 27, 97Apr 07, 98[D21C]
5728264 Avoidance of salt scaling by acidic pulp washing processExpiredOct 25, 95Mar 17, 98[D21C]
5693184 Reduction of salt scale precipitation by control of process stream pH and salt concentrationExpiredSep 04, 96Dec 02, 97[D21C]
5672247 Control scheme for rapid pulp delignification and bleachingExpiredMar 03, 95Sep 30, 97[D21C]
5656130 Ambient temperature pulp bleaching with peroxyacid saltsExpiredApr 28, 95Aug 12, 97[D21C]
5634405 Methods for removing ink from polymeric substratesExpiredJul 27, 95Jun 03, 97[B41C]
5554259 Reduction of salt scale precipitation by control of process stream Ph and salt concentrationExpiredOct 01, 93Sep 10, 96[D21C]
5525195 Process for high consistency delignification using a low consistency alkali pretreatmentExpiredSep 07, 93Jun 11, 96[D21C]
5451296 Two stage pulp bleaching reactorExpiredMar 08, 94Sep 19, 95[D21C]
5441603 Method for chelation of pulp prior to ozone delignificationExpiredJul 27, 93Aug 15, 95[D21C]
5403441 Method for controlling an ozone bleaching processExpiredNov 13, 92Apr 04, 95[D21C]
5217574 Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulpExpiredApr 16, 91Jun 08, 93[D21C]
5211811 Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignificationExpiredAug 26, 91May 18, 93[D21C]
5188708 Process for high consistency oxygen delignification followed by ozone relignificationExpiredAug 26, 91Feb 23, 93[D21C]
5181989 Reactor for bleaching high consistency pulp with ozoneExpiredOct 26, 90Jan 26, 93[D21C]
5173153 Process for enhanced oxygen delignification using high consistency and a split alkali additionExpiredJan 03, 91Dec 22, 92[D21C]

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