AKTIEBOLAGET KARLSTADS MEKANISKA WERKSTAD KARLSTAD, SWEDEN A COMPANY OF SWEDEN

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4574033 Method and apparatus for delivering a multilayer jet of stock to a forming surface in a papermaking machineExpiredJun 22, 83Mar 04, 86[D21F]
4526653 Control system for a multilayer headbox using an ultrasonic transducerExpiredSep 28, 82Jul 02, 85[D21F]
4477313 Method and apparatus for producing a multilayer paper webExpiredSep 22, 82Oct 16, 84[D21H, D21F]
4445558 Barking drum and methodExpiredFeb 28, 83May 01, 84[B27L]
4445974 Apparatus for forming a multilayer jet of paper making stockExpiredMay 22, 81May 01, 84[D21F]
4436587 Method for producing multilayer paperExpiredFeb 23, 82Mar 13, 84[D21F]
4374533 Apparatus for debarking logs and cut timberExpiredJan 22, 81Feb 22, 83[B21L]
4369823 Barking drum and methodExpiredMar 11, 81Jan 25, 83[B27L]
4356763 Control arrangements for hydraulically-operated wood particle or fiber board pressExpiredJun 24, 81Nov 02, 82[B30B]
4349414 Method for forming a multilayer jet of paper making stockExpiredSep 23, 81Sep 14, 82[D21F]
4340011 Flow distributor for a liquid film discharging deviceExpiredDec 09, 80Jul 20, 82[B05C]
4284247 Apparatus for defibrating and conditioning nonflowable cellulosic materialExpiredJan 15, 79Aug 18, 81[B02C]
4273545 Marine propeller unitExpiredSep 25, 79Jun 16, 81[B63H]
4269568 Stay ring for the spiral casing of a rotary hydraulic machineExpiredOct 22, 79May 26, 81[F01D]
4240872 Suspension device for a headbox for paper and pulp machinesExpiredMar 13, 79Dec 23, 80[D21F]
4225386 Headbox for a paper machineExpiredMar 19, 79Sep 30, 80[D21F]
4209360 Two-sided drainage in a roll-type twin-wire formerExpiredFeb 09, 79Jun 24, 80[D21F]
4199110 Process and apparatus for disintegrating waste paper while separating metallic particulate material present in the paperExpiredOct 07, 77Apr 22, 80[B02C]

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