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.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →