Patents by Inventor David Monroe Chapman
David Monroe Chapman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8617502Abstract: A catalyst for removal of NOx from exhaust gas, containing cerium oxide and titanium dioxide, wherein a first portion of the cerium oxide forms at least one agglomerate of cerium oxide crystallites interdispersed in the titanium dioxide, and a second portion of the cerium oxide forms at least one island on a surface of the titanium dioxide, a method for producing the catalyst, a process for selectively reducing NOx levels in an exhaust gas using the catalyst, and an SCR canister containing the catalyst therein.Type: GrantFiled: February 7, 2011Date of Patent: December 31, 2013Assignee: Cristal USA Inc.Inventors: Steven Mark Augustine, David Monroe Chapman, Mark Barrett Watson
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Publication number: 20120201732Abstract: A catalyst for removal of NOx from exhaust gas, containing cerium oxide and titanium dioxide, wherein a first portion of the cerium oxide forms at least one agglomerate of cerium oxide crystallites interdispersed in the titanium dioxide, and a second portion of the cerium oxide forms at least one island on a surface of the titanium dioxide, a method for producing the catalyst, a process for selectively reducing NOx levels in an exhaust gas using the catalyst, and an SCR canister containing the catalyst therein.Type: ApplicationFiled: February 7, 2011Publication date: August 9, 2012Applicant: Millennium Inorganic Chemicals, Inc.Inventors: Steven Mark AUGUSTINE, David Monroe Chapman, Mark Barrett Watson
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Patent number: 8076263Abstract: The present invention is directed to an improved catalyst support and to the resultant catalyst suitable for treating exhaust products from internal combustion engines, especially diesel engines. The support of the present invention is a structure comprising alumina core particulate having high porosity and surface area, wherein the structure has from about 1 to about 40 weight percent silica in the form of cladding on the surface area of said alumina core. The resultant support has a normalized sulfur uptake (NSU) of up to 15 ?g/m2.Type: GrantFiled: September 12, 2007Date of Patent: December 13, 2011Assignee: W. R. Grace & Co.-Conn.Inventors: Manoj Mukund Koranne, James Neil Pryor, David Monroe Chapman, Rasto Brezny
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Publication number: 20110094418Abstract: The present invention relates to a dispersion of porous surface modified silica particles including fluid and the porous particles, wherein the maximum fractional occupied volume (?max) of the particles in the dispersion is at least about 0.55 as determined from the relationship (I) wherein ? is the fractional occupied volume of the solids in the fluid, ?max is the asymptotic limit (maximum) of fractional occupied volume as the viscosity approaches infinity, b is the intrinsic viscosity, no is the viscosity of the fluid and n is the viscosity of the dispersion.Type: ApplicationFiled: June 15, 2005Publication date: April 28, 2011Inventor: David Monroe Chapman
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Publication number: 20100267552Abstract: The present invention is directed to an improved catalyst support and to the resultant catalyst suitable for treating exhaust products from internal combustion engines, especially diesel engines. The support of the present invention is a structure comprising alumina core particulate having high porosity and surface area, wherein the structure has from about 1 to about 40 weight percent silica in the form of cladding on the surface area of said alumina core. The resultant support has a normalized sulfur uptake (NSU) of up to 15 ?g/m2.Type: ApplicationFiled: September 12, 2007Publication date: October 21, 2010Inventors: Mukund Manoj Koranne, James Neil Pryor, David Monroe Chapman, Rasto Brezny
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Patent number: 7393571Abstract: Formulations comprising novel porous metal oxide particles and binder are particularly suitable for ink receptive coatings, e.g., for ink jet papers and films. The metal oxide particles used in this application have a porous structure that differs significantly from the nonporous silica colloids. The particles have a median particle size in the range of about 0.05 to about 3 microns and porosity such that when an aqueous dispersion of the particles is dried at least 0.5 cc/g of pore volume is from pores having a pore size of 600 ? or less. The particles also have a viscosity derived pore volume of at least 0.5 cc/g.Type: GrantFiled: July 7, 2004Date of Patent: July 1, 2008Assignee: W. R. Grace & Co.-Conn.Inventors: David Monroe Chapman, Demetrius Michos
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Patent number: 6841609Abstract: Formulations comprising novel porous metal oxide particles and binder are particularly suitable for ink receptive coatings, e.g., for ink jet papers and films. The metal oxide particles used in this application have a porous structure that differs significantly from the nonporous silica colloids. The particles have a median particle size in the range of about 0.05 to about 3 microns and porosity such that when an aqueous dispersion of the particles is dried at least 0.5 cc/g of pore volume is from pores having a pore size of 600 ? or less. The particles also have a viscosity derived pore volume of at least 0.5 cc/g.Type: GrantFiled: July 9, 1998Date of Patent: January 11, 2005Assignee: W. R. Grace & Co.-Conn.Inventors: David Monroe Chapman, Demetrius Michos
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Publication number: 20040241425Abstract: Formulations comprising novel porous metal oxide particles and binder are particularly suitable for ink receptive coatings, e.g., for ink jet papers and films. The metal oxide particles used in this application have a porous structure that differs significantly from the nonporous silica colloids. The particles have a median particle size in the range of about 0.05 to about 3 microns and porosity such that when an aqueous dispersion of the particles is dried at least 0.5 cc/g of pore volume is from pores having a pore size of 600 Å or less. The particles also have a viscosity derived pore volume of at least 0.5 cc/g.Type: ApplicationFiled: July 7, 2004Publication date: December 2, 2004Inventors: David Monroe Chapman, Demetrius Michos
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Patent number: 6818685Abstract: The coating composition comprises inorganic oxide, e.g., silica, in combination with a binder system comprising a mixture of a water soluble polymer and non-ionic latex polymer. The composition may contain optional dye mordant (e.g., cationic polymer). It is found that the combinations of these components result in relatively high solids formulations (e.g., greater than 20% by weight) with relatively low viscosity (less than 5000 centipose), do not exhibit coating dusting, and give exceptional ink-jet printability. These formulations are especially suitable for preparing on-line formulations because they can be formulated to have a viscosity less than 2000 centipose. Preferable embodiments for online coatings have a viscosity less than 1000 centipose.Type: GrantFiled: July 8, 1999Date of Patent: November 16, 2004Assignee: W. R. Grace & Co. -Conn.Inventor: David Monroe Chapman
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Patent number: 6780920Abstract: Formulations comprising novel porous metal oxide particles and binder are particularly suitable for ink receptive coatings, e.g., for ink jet papers and films. The metal oxide particles used in this application have a porous structure that differs significantly from the nonporous silica colloids. The particles have a median particle size in the range of about 0.05 to about 3 microns and porosity such that when an aqueous dispersion of the particles is dried at least 0.5 cc/g of pore volume is from pores having a pore size of 600 Å or less. The particles also have a viscosity derived pore volume of at least 0.5 cc/g. Formulations comprising particles having a zeta potential of +20 mV are also disclosed.Type: GrantFiled: November 26, 2002Date of Patent: August 24, 2004Assignee: W. R. Grace & Co.-Conn.Inventors: David Monroe Chapman, Demetrius Michos
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Publication number: 20030191226Abstract: Formulations comprising novel porous metal oxide particles and binder are particularly suitable for ink receptive coatings, e.g., for ink jet papers and films. The metal oxide particles used in this application have a porous structure that differs significantly from the nonporous silica colloids. The particles have a median particle size in the range of about 0.05 to about 3 microns and porosity such that when an aqueous dispersion of the particles is dried at least 0.5 cc/g of pore volume is from pores having a pore size of 600 Å or less. The particles also have a viscosity derived pore volume of at least 0.5 cc/g.Type: ApplicationFiled: July 9, 1998Publication date: October 9, 2003Inventors: DAVID MONROE CHAPMAN, DEMETRIUS MICHOS
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Publication number: 20030181566Abstract: Formulations comprising novel porous metal oxide particles and binder are particularly suitable for ink receptive coatings, e.g., for ink jet papers and films. The metal oxide particles used in this application have a porous structure that differs significantly from the nonporous silica colloids. The particles have a median particle size in the range of about 0.05 to about 3 microns and porosity such that when an aqueous dispersion of the particles is dried at least 0.5 cc/g of pore volume is from pores having a pore size of 600 Å or less. The particles also have a viscosity derived pore volume of at least 0.5 cc/g.Type: ApplicationFiled: November 26, 2002Publication date: September 25, 2003Inventors: David Monroe Chapman, Demetrius Michos
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Patent number: 6380265Abstract: A dispersion comprising fine porous inorganic oxide particles, e.g., silica gel particles, wherein the particles have a median particle size below three microns. The dispersed particles have a porosity after drying in which at least about 0.50 cc/g of pore volume is from pores having a pore size of 600 Å or less as determined by nitrogen porosimetry. Embodiments prepared from silica gel have porosity after drying in which at least about 0.7 cc/g of pore volume is from pores having a diameter of 600 Å or smaller. The particles of the dispersion also can be described as having viscosity derived pore volume of at least about 0.5 g/cc. The dispersion is prepared by forming a dispersion from inorganic oxides having sufficient rigid structure to maintain porosity after milling and drying. After the inorganic oxide is selected, it is milled to have a median particle size of 0.05 to about 3 microns.Type: GrantFiled: June 30, 1999Date of Patent: April 30, 2002Assignee: W. R. Grace & Co.-Conn.Inventors: James Neil Pryor, David Monroe Chapman