Assignee
AHLSTROM MACHINERY INC
US·43 granted patents·1,058 citations·filing 1991–1998
Top patents by PatentIndex Score
43 records- 0195US5968314AChip feeding for a digesterAHLSTROM MACHINERY INC·Filed 1997·Granted Oct 19, 1999·43 cites·26 claims
- 0294US5622598AChip pumping to a digesterAHLSTROM MACHINERY INC·Filed 1995·Granted Apr 22, 1997·55 cites·21 claims
- 0393US5700355AChip feeding for a continuous digesterAHLSTROM MACHINERY INC·Filed 1995·Granted Dec 23, 1997·36 cites·11 claims
- 0492US5635025ADigester system containing a single vessel serving as all of a chip bin, steaming vessel, and chip chuteAHLSTROM MACHINERY INC·Filed 1994·Granted Jun 3, 1997·55 cites·23 claims
- 0592US5620562ADissolved solids control in pulp productionAHLSTROM MACHINERY INC·Filed 1996·Granted Apr 15, 1997·29 cites·30 claims
- 0690US5662775AContinuous digester with dissolved solids handlingAHLSTROM MACHINERY INC·Filed 1995·Granted Sep 2, 1997·35 cites·16 claims
- 0789US5628873AChip bin assembly including a hollow transition with one dimensional convergence and side reliefAHLSTROM MACHINERY INC·Filed 1994·Granted May 13, 1997·34 cites·20 claims
- 0889US5617975AChip feed systemAHLSTROM MACHINERY INC·Filed 1995·Granted Apr 8, 1997·36 cites·20 claims
- 0989US5536366ADigester system for implementing low dissolved solids profilingAHLSTROM MACHINERY INC·Filed 1993·Granted Jul 16, 1996·33 cites·13 claims
- 1088US5736006AMethod and apparatus for pulping with controlled heating to improve delignification and pulp strengthAHLSTROM MACHINERY INC·Filed 1996·Granted Apr 7, 1998·38 cites·20 claims
- 1186US6086712ADOM control in cellulose pulp productionAHLSTROM MACHINERY INC·Filed 1998·Granted Jul 11, 2000·20 cites·43 claims
- 1286US5882477AContinuous digester with a low temperature gas-phaseAHLSTROM MACHINERY INC·Filed 1997·Granted Mar 16, 1999·29 cites·20 claims
- 1386US5849151AContinuous digester having means for implementing low dissolved solids profilingAHLSTROM MACHINERY INC·Filed 1997·Granted Dec 15, 1998·27 cites·20 claims
- 1485US5795438AMethod and apparatus for feeding multiple digestersAHLSTROM MACHINERY INC·Filed 1996·Granted Aug 18, 1998·33 cites·20 claims
- 1585US5674359AContinuous cooking of cellulosic fibrous material with cold alkali impregnationAHLSTROM MACHINERY INC·Filed 1995·Granted Oct 7, 1997·34 cites·24 claims
- 1684US5849150ALow dissolved solids control in pulp productionAHLSTROM MACHINERY INC·Filed 1996·Granted Dec 15, 1998·18 cites·16 claims
- 1782US5766418AHandling fibrous material used to produce cellulose pulpAHLSTROM MACHINERY INC·Filed 1996·Granted Jun 16, 1998·29 cites·14 claims
- 1881US5985096AVertical pulping digester having substantially constant diameterAHLSTROM MACHINERY INC·Filed 1997·Granted Nov 16, 1999·26 cites·22 claims
- 1981US5635026ACooking cellulose material with high alkali concentrations and/or high pHAHLSTROM MACHINERY INC·Filed 1995·Granted Jun 3, 1997·26 cites·19 claims
- 2080US5779856ACooking cellulose material using high alkali concentrations and/or high pH near the end of the cookAHLSTROM MACHINERY INC·Filed 1996·Granted Jul 14, 1998·23 cites·21 claims
- 2178US5813758AConcentric ring fluidizing mixerAHLSTROM MACHINERY INC·Filed 1993·Granted Sep 29, 1998·54 cites·16 claims
- 2277US6106668AMethod for feeding comminuted fibrous materialAHLSTROM MACHINERY INC·Filed 1998·Granted Aug 22, 2000·22 cites·25 claims
- 2375US5824188AMethod of controlling the pressure of a continuous digester using an extraction-dilutionAHLSTROM MACHINERY INC·Filed 1996·Granted Oct 20, 1998·21 cites·17 claims
- 2475US5547546AChip bin with steaming control and a gas vent containing a vacuum and pressure relief deviceAHLSTROM MACHINERY INC·Filed 1994·Granted Aug 20, 1996·22 cites·18 claims
- 2572US6039841AScreen having inclined slots for use in a continuous digesterAHLSTROM MACHINERY INC·Filed 1996·Granted Mar 21, 2000·21 cites·20 claims
- 2671US6123808ADistribution of dilution liquor to the discharge of a cellulose pulp digesterAHLSTROM MACHINERY INC·Filed 1997·Granted Sep 26, 2000·22 cites·21 claims
- 2771US6024837ALow temperature gas phase continuous digesterAHLSTROM MACHINERY INC·Filed 1998·Granted Feb 15, 2000·14 cites·8 claims
- 2868US5958181AContinuous cooking with a two-stage cool impregnationAHLSTROM MACHINERY INC·Filed 1997·Granted Sep 28, 1999·14 cites·18 claims
- 2968US5529190AGas sparged hydrocyclone with foam separating vesselAHLSTROM MACHINERY INC·Filed 1995·Granted Jun 25, 1996·33 cites·20 claims
- 3065US6106667ATreatment of recycled bleach plant filtratesAHLSTROM MACHINERY INC·Filed 1992·Granted Aug 22, 2000·15 cites·15 claims
- 3163US6024227ATramp material removal from pulp feed systemsAHLSTROM MACHINERY INC·Filed 1997·Granted Feb 15, 2000·19 cites·20 claims
- 3262US6153300ABleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicalsAHLSTROM MACHINERY INC·Filed 1994·Granted Nov 28, 2000·21 cites·19 claims
- 3361US5882475AMethod of recovering fibers from a reject stream generated in a wastepaper treating processAHLSTROM MACHINERY INC·Filed 1997·Granted Mar 16, 1999·16 cites·20 claims
- 3459US5660686ACooking with spent liquor pretreatment of cellulose materialAHLSTROM MACHINERY INC·Filed 1995·Granted Aug 26, 1997·11 cites·28 claims
- 3557USH1681HDischarge from pulping vessels without the aid of mechanical agitationAHLSTROM MACHINERY INC·Filed 1995·Granted Oct 7, 1997·9 cites·20 claims
- 3654US5567279AVariable stage pressure diffuserAHLSTROM MACHINERY INC·Filed 1991·Granted Oct 22, 1996·12 cites·21 claims
- 3753US6120647ASimplified liquid removal system for a cellulose pulp digesterAHLSTROM MACHINERY INC·Filed 1998·Granted Sep 19, 2000·7 cites·21 claims
- 3853US5560818AAdjustable orifice for gas-sparged hydrocycloneAHLSTROM MACHINERY INC·Filed 1994·Granted Oct 1, 1996·10 cites·17 claims
- 3952US5639347AMethod of controlling of metals in a bleach plant, using oxidationAHLSTROM MACHINERY INC·Filed 1993·Granted Jun 17, 1997·16 cites·19 claims
- 4050US5567262ATwo stage pressure diffuserAHLSTROM MACHINERY INC·Filed 1991·Granted Oct 22, 1996·9 cites·15 claims
- 4148US5547543AApparatus for minimizing effluent discharges and recovering chemicals in a pulp millAHLSTROM MACHINERY INC·Filed 1994·Granted Aug 20, 1996·10 cites·14 claims
- 4247US5567274AMethod of controlling pressurized ozone to a pulp delignification reactorAHLSTROM MACHINERY INC·Filed 1994·Granted Oct 22, 1996·7 cites·8 claims
- 4343US5690341AMethod and apparatus for the facilitating the servicing of drive-shaft assemblies for pressurized vesselsAHLSTROM MACHINERY INC·Filed 1996·Granted Nov 25, 1997·14 cites·21 claims
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