Inventor
WILLIS MITCHELL J
US20 patents
Patents
20 patentsUS5411587AMay 2, 1995
Paper coating kaolin pigments their preparation and use
ENGELHARD CORP52 citations94
US4738726AApr 19, 1988
Treatment of clays with cationic polymers to prepare high bulking pigments
ENGELHARD CORP69 citations94
US5169443ADec 8, 1992
Paper coating kaolin pigments there preparation and use
ENGELHARD CORP55 citations93
US5938833AAug 17, 1999
Chemical process for fractionating mineral particles based on particle size
ENGELHARD CORP25 citations92
US5603411AFeb 18, 1997
Method for separating mixture of finely divided minerals
ENGELHARD CORP45 citations92
US5535890AJul 16, 1996
Method for separating mixture of finely divided minerals
ENGELHARD CORP37 citations92
US5749958AMay 12, 1998
Delaminated kaolin pigments their preparation and use in paper coating
ENGELHARD CORP40 citations91
US5645635AJul 8, 1997
Delaminated kaolin pigments, their preparation and use in paper filling applications
ENGELHARD CORP39 citations91
US6696378B2Feb 24, 2004
Fluid catalytic cracking catalyst manufacturing process
ENGELHARD CORP27 citations90
US5011534AApr 30, 1991
Calcined kaolin clay filler pigment for enhancing opacity and printing properties of newsprint and mechanical papers
ENGELHARD CORP50 citations89
US4781298ANov 1, 1988
Process for beneficiating clay at high solids
ENGELHARD CORP37 citations89
US5328506AJul 12, 1994
Pigment products in an agglomerated form and use thereof in bulk shipments
ENGELHARD CORP23 citations85
US5584394ADec 17, 1996
Colored titaniferous coating pigment obtained as a flocculated by-product in a kaolin purification process
ENGELHARD CORP17 citations81
US4784758ANov 15, 1988
Process for removing magnetic particles from a suspension of solids in a liquid
ENGELHARD CORP19 citations74
US5922207AJul 13, 1999
Filter aid for clay processing
ENGELHARD CORP11 citations73
US5688315ANov 18, 1997
Colored titaniferous coating pigment obtained as a flocculated by-product in a kaolin purification process
ENGELHARD CORP5 citations73
US5342443AAug 30, 1994
Method for bleaching kaolin clay
ENGELHARD CORP16 citations72
US5391526AFeb 21, 1995
Situ method for producing hydrosulfite bleach and use thereof
ENGELHARD CORP8 citations70
US5145814ASep 8, 1992
In situ method for producing hydrosulfite beach and use thereof
ENGELHARD CORP7 citations70
US5997626ADec 7, 1999
Low abrasion calcined kaolin pigments and enhanced filtration method
ENGELHARD CORP14 citations69