Aktiebolaget Frotator

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4732335 Apparatus for treating cellulose pulp with intermeshing disks and assymetrical pulp moving meansExpiredJul 07, 86Mar 22, 88[B02C, D21D]
4732336 Apparatus for treating cellulose pulp with intermeshing disks and asymmetrically pulp moving meansExpiredJul 07, 86Mar 22, 88[B02C, D21D]
4655406 Apparatus for treating cellulose pulp with intermeshing disks and asymmetrical guide finsExpiredNov 27, 84Apr 07, 87[B02C, D21D]
4586665 Apparatus for treating cellulose pulp with adjustable treating gapExpiredNov 27, 84May 06, 86[D21B, B21C, D21D]
4393983 Intermeshing screw-type refinerExpiredJul 24, 81Jul 19, 83[B30B]
4339084 Pulp refining apparatus with adjustable treating gapExpiredDec 28, 79Jul 13, 82[B02C]

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