Assignee
BLACK CLAWSON CO
US·116 granted patents·2,988 citations·filing 1972–1997
Top patents by PatentIndex Score
116 records- 0196US4422588ASlitter-rewinder systemBLACK CLAWSON CO·Filed 1981·Granted Dec 27, 1983·118 cites·12 claims
- 0295US4431140AContinuous pressure roll winderBLACK CLAWSON CO·Filed 1981·Granted Feb 14, 1984·72 cites·5 claims
- 0394US4199118AMethod and apparatus for controlling the braking system for an unwinderBLACK CLAWSON CO·Filed 1979·Granted Apr 22, 1980·56 cites·10 claims
- 0493US4993652AContinuous winder for web materialsBLACK CLAWSON CO·Filed 1989·Granted Feb 19, 1991·65 cites·12 claims
- 0593US4363697AMethod for medium consistency oxygen delignification of pulpBLACK CLAWSON CO·Filed 1979·Granted Dec 14, 1982·42 cites·13 claims
- 0693US4248662AOxygen pulping with recycled liquorBLACK CLAWSON CO·Filed 1979·Granted Feb 3, 1981·53 cites·10 claims
- 0792US5845867AContinuous winderBLACK CLAWSON CO·Filed 1997·Granted Dec 8, 1998·88 cites·8 claims
- 0891US5064537ASeamless screen cylinder with laser cut openingsBLACK CLAWSON CO·Filed 1989·Granted Nov 12, 1991·76 cites·9 claims
- 0991US4286757AMethod and apparatus for controlling the braking system for an unwinderBLACK CLAWSON CO·Filed 1980·Granted Sep 1, 1981·48 cites·5 claims
- 1090US4725007AApparatus for pulping high consistency paper making stockBLACK CLAWSON CO·Filed 1986·Granted Feb 16, 1988·42 cites·2 claims
- 1190US4596633ASurface treatment of paper and paperboardBLACK CLAWSON CO·Filed 1984·Granted Jun 24, 1986·44 cites·10 claims
- 1289US4811915ARider roll relieving systemBLACK CLAWSON CO·Filed 1987·Granted Mar 14, 1989·56 cites·5 claims
- 1389US4795560AScreen platesBLACK CLAWSON CO·Filed 1987·Granted Jan 3, 1989·62 cites·16 claims
- 1489US4435249AProcess for the oxygen delignification of pulp mill rejectsBLACK CLAWSON CO·Filed 1981·Granted Mar 6, 1984·39 cites·9 claims
- 1589US4267035APressurized rotary screening apparatusBLACK CLAWSON CO·Filed 1979·Granted May 12, 1981·32 cites·10 claims
- 1689US4155841AHigh turbulence screenBLACK CLAWSON CO·Filed 1977·Granted May 22, 1979·31 cites·10 claims
- 1789US4109872APulping apparatus for liquid slurry stockBLACK CLAWSON CO·Filed 1977·Granted Aug 29, 1978·36 cites·10 claims
- 1888US4593861AApparatus for pulping paper making stock at high consistenciesBLACK CLAWSON CO·Filed 1984·Granted Jun 10, 1986·50 cites·10 claims
- 1988US4384920AMethod and apparatus for oxygen delignificationBLACK CLAWSON CO·Filed 1982·Granted May 24, 1983·33 cites·14 claims
- 2087US4535943APulping apparatus including a rotor and helical screw flights extending upwardly from the rotorBLACK CLAWSON CO·Filed 1984·Granted Aug 20, 1985·33 cites·8 claims
- 2187US4422586AMethod and apparatus for roll changingBLACK CLAWSON CO·Filed 1981·Granted Dec 27, 1983·34 cites·12 claims
- 2286US4431480AMethod and apparatus for controlled addition of alkaline chemicals to an oxygen delignification reactionBLACK CLAWSON CO·Filed 1981·Granted Feb 14, 1984·28 cites·11 claims
- 2386US4399028AFroth flotation apparatus and methodBLACK CLAWSON CO·Filed 1982·Granted Aug 16, 1983·59 cites·19 claims
- 2485US4476019APellet dryerBLACK CLAWSON CO·Filed 1983·Granted Oct 9, 1984·46 cites·3 claims
- 2585US4081147AReversible disk refiner platesBLACK CLAWSON CO·Filed 1976·Granted Mar 28, 1978·29 cites·2 claims
- 2684US5014924AApparatus and method for roll changing on a continuous winderBLACK CLAWSON CO·Filed 1989·Granted May 14, 1991·30 cites·6 claims
- 2784US4354449ATwo sided coaterBLACK CLAWSON CO·Filed 1980·Granted Oct 19, 1982·50 cites·3 claims
- 2883US4410424AScreening apparatus for paper making stockBLACK CLAWSON CO·Filed 1982·Granted Oct 18, 1983·24 cites·5 claims
- 2983US4238261AMethod for forming a zero tail length splice in a moving webBLACK CLAWSON CO·Filed 1978·Granted Dec 9, 1980·37 cites·6 claims
- 3082US5262003AMethod and system for defibering paper making materialsBLACK CLAWSON CO·Filed 1991·Granted Nov 16, 1993·44 cites·11 claims
- 3182US5133832AProcess and system for preparation of waste paper stock with short and long fiber fractionationBLACK CLAWSON CO·Filed 1991·Granted Jul 28, 1992·41 cites·4 claims
- 3282US4722793AApparatus and method for thickening pulp and paper stockBLACK CLAWSON CO·Filed 1987·Granted Feb 2, 1988·29 cites·20 claims
- 3382US4113626ADewatering screenBLACK CLAWSON CO·Filed 1977·Granted Sep 12, 1978·65 cites·4 claims
- 3481US5006056AFilm extrusion apparatus including a quickly replaceable chill rollBLACK CLAWSON CO·Filed 1990·Granted Apr 9, 1991·62 cites·9 claims
- 3580US5324389AWaste paper disintegration, classification and pulping systemBLACK CLAWSON CO·Filed 1992·Granted Jun 28, 1994·31 cites·3 claims
- 3680US4030671AApparatus for pulping waste paper materialsBLACK CLAWSON CO·Filed 1976·Granted Jun 21, 1977·20 cites·8 claims
- 3778US5356496ASplice tail tape-down method and apparatusBLACK CLAWSON CO·Filed 1992·Granted Oct 18, 1994·39 cites·13 claims
- 3878US3950988AApparatus for measuring tension in a moving webBLACK CLAWSON CO·Filed 1975·Granted Apr 20, 1976·26 cites·4 claims
- 3977US5022984AFroth flotation apparatus and methodBLACK CLAWSON CO·Filed 1990·Granted Jun 11, 1991·34 cites·7 claims
- 4077US4948467AExtended nip press with induced repulsionBLACK CLAWSON CO·Filed 1989·Granted Aug 14, 1990·43 cites·3 claims
- 4177US4326679AMethod and apparatus for roll changing on a winder deviceBLACK CLAWSON CO·Filed 1980·Granted Apr 27, 1982·22 cites·11 claims
- 4277US4231318ADual blade coaterBLACK CLAWSON CO·Filed 1978·Granted Nov 4, 1980·30 cites·8 claims
- 4376US4383918AHigh turbulence screenBLACK CLAWSON CO·Filed 1980·Granted May 17, 1983·17 cites·11 claims
- 4476US4276159AApparatus for screening paper fiber stockBLACK CLAWSON CO·Filed 1980·Granted Jun 30, 1981·33 cites·6 claims
- 4576US4155839AReverse centrifugal cleaning of paper making stockBLACK CLAWSON CO·Filed 1977·Granted May 22, 1979·17 cites·11 claims
- 4675US5039412AWire with guide belts for a pulp thickenerBLACK CLAWSON CO·Filed 1990·Granted Aug 13, 1991·24 cites·1 claims
- 4775US4919797AScreening apparatus for paper making stockBLACK CLAWSON CO·Filed 1989·Granted Apr 24, 1990·34 cites·8 claims
- 4875US4885090AScreen platesBLACK CLAWSON CO·Filed 1988·Granted Dec 5, 1989·38 cites·7 claims
- 4974US4356084ASelf-sealing valve assembly to facilitate unplugging of a centrifugal cleanerBLACK CLAWSON CO·Filed 1979·Granted Oct 26, 1982·23 cites·10 claims
- 5073US4129259AApparatus for pulping waste paper materialsBLACK CLAWSON CO·Filed 1977·Granted Dec 12, 1978·24 cites·10 claims
Showing the top 50 of 116 patent records by PatentIndex Score.
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