KVAERNER PULPING AB
Patent Owner
Stats
- 8 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Apr 30, 2009 most recent publication
Details
- 8 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 140 Total Citation Count
- May 30, 1991 Earliest Filing
- 19 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
Rank in Class
Top Patents (by citation)
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Recent Publications
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Recent Patents
Patent #
Title
Filing Date
Issue Date
Intl Class
6024833 Process for removing metals and recovering a chelating agent from a bleach plant waste liquorMay 02, 97Feb 15, 00[D21C]
5993601 Process for producing polysulphide by means of oxidizing sulphide in spent liquors from kraft cellulose cookingJan 21, 98Nov 30, 99[D21C]
5972228 Filters employing "filling bodies" to reduce the amount of backwashing fluid remaining in the filters after backwashingMay 15, 97Oct 26, 99[B01D]
5567280 Digester for cooking pulp having staggered circular screens for isothermal cookingMar 31, 95Oct 22, 96[D21C]
5346588 Process for the chlorine-free bleaching of cellulosic materials with ozoneMar 26, 92Sep 13, 94[D21C]
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
2009/0107,642 METHOD FOR OXYGEN DELIGNIFICATION OF CELLULOSE PULP AT HIGH PRESSURE IN SEVERAL STEPSAbandonedSep 20, 05Apr 30, 09[D21C]
2008/0271,861 Method for Oxygen Delignification of Cellulose Pulp by Mixing of ChemicalsAbandonedSep 05, 05Nov 06, 08[D21C]
2004/0140,068 Feeding arrangement for feeding of chips to chip binsAbandonedOct 22, 03Jul 22, 04[D21B]
2003/0056,295 Reduction of organically bound chlorine formed in chlorine dioxide bleachingAbandonedAug 08, 02Mar 27, 03[D06L]
2002/0124,977 Device for distributing cellulose pulp of low and medium consistency in order to form a uniform pulp webAbandonedNov 06, 01Sep 12, 02[D21B, D21F, D21C]
6258282 Rotatable filter system for filtration of a flowing substanceExpiredApr 10, 00Jul 10, 01[B01D]
6241852 Method and device for mixing of a fluid into a pulp-suspension at the lowest pressure of the suspensionExpiredJan 09, 97Jun 05, 01[D21C]
6071378 Method and device for treating a pulp suspensionExpiredJan 16, 98Jun 06, 00[D06B, B30B, D21C]
5911854 Method of purifying electric precipitator ash using a pressure filterExpiredApr 11, 97Jun 15, 99[D21C]
5901585 Drum supported by support rollers for washing fibre materialExpiredMar 12, 98May 11, 99[D21C]
5900123 Device for distributing liquid, especially washing liquid, for washing paper pulpExpiredFeb 09, 96May 04, 99[D21H]
5770072 Multiple inlet valve with means to isolate each inlet individually and direct a reverse flow therethroughExpiredAug 14, 96Jun 23, 98[B01D]
5540816 Method of integrating bleaching and recovery in the production of pulpExpiredApr 08, 94Jul 30, 96[D21C]
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