Celleco AB

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5164042 Method and plant for producing high-yield pulp from pulp chip material containing lignocelluloseExpiredOct 29, 91Nov 17, 92[D21B]
4814093 Rotatable filter assembly and method of operating sameExpiredSep 15, 87Mar 21, 89[B01D]
4650570 Strainer assembly for pulpExpiredNov 28, 84Mar 17, 87[D21D]
4537314 Vortex cleanerExpiredAug 16, 83Aug 27, 85[B04C]
4510056 Hydrocyclone separatorExpiredNov 30, 82Apr 09, 85[B04C]
4441999 Strainer means for pulp purificationExpiredJan 26, 81Apr 10, 84[B01D]
4374729 Strainer drum for pulp and the likeExpiredJan 26, 81Feb 22, 83[B01D]
4334986 Separator for a mixture of a suspension and coarse heavy particlesExpiredFeb 25, 81Jun 15, 82[B04C]
4333572 Separation of pulp flowExpiredDec 15, 80Jun 08, 82[D21D]
4278534 Method for separation of material mixtures, containing abrasive particles, in a hydrocyclone separatorExpiredNov 16, 79Jul 14, 81[B04C]
4238208 Apparatus for degassing paper stockExpiredNov 22, 78Dec 09, 80[B01D]
4211643 Hydrocyclone separatorExpiredFeb 16, 79Jul 08, 80[B04C]

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