Patents by Inventor David William Bjorkquist
David William Bjorkquist 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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Publication number: 20170144132Abstract: Embodiments of systems and methods for producing a coated activated carbon comprise the steps of providing activated carbon particles having a particle size up to about 100 ?m, and coating the activated carbon particles by spraying droplets of a cationic polymer solution onto the surface of the activated carbon particles, wherein the cationic polymer solution comprises about 1% to about 15% by weight cationic polymer and the droplet size is between about 5 ?m to about 100 ?m.Type: ApplicationFiled: February 3, 2017Publication date: May 25, 2017Inventors: Andrew Thomas Pearks, Aloysius Ike Ononye, Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Peter William Beerse
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Publication number: 20110139701Abstract: Embodiments of systems and methods for producing a coated activated carbon comprise the steps of providing activated carbon particles having a particle size up to about 100 ?m, and coating the activated carbon particles by spraying droplets of a cationic polymer solution onto the surface of the activated carbon particles, wherein the cationic polymer solution comprises about 1% to about 15% by weight cationic polymer and the droplet size is between about 5 ?m to about 100 ?m.Type: ApplicationFiled: December 9, 2010Publication date: June 16, 2011Applicant: PUR WATER PURIFICATION PRODUCTS, INC.Inventors: Andrew Thomas Pearks, Aloysius Ike Ononye, Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Peter William Beerse
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Patent number: 7749394Abstract: Disclosed is a method of providing potable water that includes providing a filter, passing water through the filter, and removing bacteria and viruses from the water with the filter. The filter comprises a housing having an inlet and an outlet and a filter material disposed within the housing, the filter material formed at least in part from a plurality of filter particles consisting of mesoporous activated carbon wherein at least a portion of the plurality of filter particles is at least partially coated with silver or a silver-containing material. A sum of mesopore and macropore volumes of the filter particles may be between about 0.2 mL/g and about 2 mL/g, wherein mesopore means an intra-particle pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, a total pore volume of the filter particles is greater than about 0.Type: GrantFiled: May 13, 2009Date of Patent: July 6, 2010Assignee: The Procter & Gamble CompanyInventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Patent number: 7740766Abstract: Disclosed is a method of providing potable water that includes providing a filter, passing water through the filter, and removing bacteria and viruses from the water with the filter. The filter comprises a housing having an inlet and an outlet and a filter material disposed within the housing, the filter material formed at least in part from a plurality of mesoporous wood activated carbon filter particles and particles selected from the group consisting of mesoporous wood activated carbon filter particles coated entirely with a cationic polymer, mesoporous wood activated carbon filter particles partially coated with a cationic polymer, and mixtures thereof. A sum of mesopore and macropore volumes of the filter particles may be between about 0.2 mL/g and about 2 mL/g, wherein mesopore means an intra-particle pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, a total pore volume of the filter particles is greater than about 0.Type: GrantFiled: May 13, 2009Date of Patent: June 22, 2010Assignee: The Procter & Gamble CompanyInventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Patent number: 7740765Abstract: Disclosed is a method of providing potable water that includes providing a filter, passing water through the filter, and removing bacteria and viruses from the water with the filter. The filter comprises a housing having an inlet and an outlet and a filter material disposed within the housing, the filter material formed at least in part from a plurality of filter particles consisting of mesoporous activated carbon. A sum of mesopore and macropore volumes of the filter particles may be between about 0.2 mL/g and about 2 mL/g, wherein mesopore means an intra-particle pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, a total pore volume of the filter particles is greater than about 0.4 mL/g and less than about 3 mL/g, and a ratio of the sum of the mesopore and macropore volumes to the total pore volume of the filter particles is greater than about 0.3.Type: GrantFiled: May 13, 2009Date of Patent: June 22, 2010Assignee: The Procter & Gamble CompanyInventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Patent number: 7614508Abstract: A filter for providing potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter material formed at least in part from a plurality of mesoporous, basic, and reduced-oxygen activated carbon filter particles. Preferably, at least some of the mesoporous activated carbon filter particles are coated with silver or a silver containing material. Kits comprising filters and information relating to the killing or removal of bacteria, viruses, and microbials are also provided.Type: GrantFiled: November 11, 2003Date of Patent: November 10, 2009Assignee: PUR Water Purification Products Inc.Inventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Patent number: 7614506Abstract: A filter for providing potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter material formed at least in part from a plurality of mesoporous, basic, and reduced-oxygen activated carbon filter particles.Type: GrantFiled: June 18, 2003Date of Patent: November 10, 2009Assignee: PUR Water Purification Products Inc.Inventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Patent number: 7614507Abstract: A filter for providing potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter material formed at least in part from a plurality of mesoporous, basic, and reduced-oxygen activated carbon filter particles. Preferably, at least some of the mesoporous activated carbon filter particles are coated with a cationic polymer, and even more preferably, at least some of the particles are coated with a cationic polymer and silver or a silver containing material. Kits comprising filters and information relating to the killing or removal of bacteria, viruses, and microbials are also provided.Type: GrantFiled: November 11, 2003Date of Patent: November 10, 2009Assignee: PUR Water Purification Products Inc.Inventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Publication number: 20090230061Abstract: Disclosed is a method of providing potable water that includes providing a filter, passing water through the filter, and removing bacteria and viruses from the water with the filter. The filter comprises a housing having an inlet and an outlet and a filter material disposed within the housing, the filter material formed at least in part from a plurality of filter particles consisting of mesoporous activated carbon. A sum of mesopore and macropore volumes of the filter particles may be between about 0.2 mL/g and about 2 mL/g, wherein mesopore means an intra-particle pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, a total pore volume of the filter particles is greater than about 0.4 mL/g and less than about 3 mL/g, and a ratio of the sum of the mesopore and macropore volumes to the total pore volume of the filter particles is greater than about 0.3.Type: ApplicationFiled: May 13, 2009Publication date: September 17, 2009Inventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Wolley
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Publication number: 20090218292Abstract: Disclosed is a method of providing portable water that includes providing a filter, passing water through the filter, and removing bacteria and viruses from the water with the filter. The filter comprises a housing having an inlet and an outlet and a filter material disposed within the housing, the filter material formed at least in part from a plurality of filter particles consisting of mesoporous activated carbon wherein at least a portion of the plurality of filter particles is at least partially coated with silver or a silver-containing material. A sum of mesopore and macropore volumes of the filter particles may be between about 0.2 mL/g and about 2 mL/g, wherein mesopore means an intra-particle pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, a total pore volume of the filter particles is greater than about 0.Type: ApplicationFiled: May 13, 2009Publication date: September 3, 2009Inventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Publication number: 20090218291Abstract: Disclosed is a method of providing potable water that includes providing a filter, passing water through the filter, and removing bacteria and viruses from the water with the filter. The filter comprises a housing having an inlet and an outlet and a filter material disposed within the housing, the filter material formed at least in part from a plurality of mesoporous wood activated carbon filter particles and particles selected from the group consisting of mesoporous wood activated carbon filter particles coated entirely with a cationic polymer, mesoporous wood activated carbon filter particles partially coated with a cationic polymer, and mixtures thereof. A sum of mesopore and macropore volumes of the filter particles may be between about 0.2 mL/g and about 2 mL/g, wherein mesopore means an intra-particle pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, a total pore volume of the filter particles is greater than about 0.Type: ApplicationFiled: May 13, 2009Publication date: September 3, 2009Inventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Publication number: 20040164018Abstract: A filter for providing potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter mateial formed at least in part from a plurality of mesoporous, basic, and reduced-oxygen activated carbon filter particles. Preferably, at least some of the mesoporous activated carbon filter particles are coated with a cationic polymer, and even more preferably, at least some of the particles are coated with a cationic polymer and silver or a silver containing material. Kits comprising filters and information relating to the killing or removal of bacteria, viruses, and microbials are also provided.Type: ApplicationFiled: November 11, 2003Publication date: August 26, 2004Applicant: The Procter & Gamble CompanyInventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Publication number: 20040159596Abstract: A filter for providing potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter material formed at least in part from a plurality of mesoporous, basic, and reduced-oxygen activated carbon filter particles. Preferably, at least some of the mesoporous activated carbon filter particles are coated with silver or a silver containing material. Kits comprising filters and information relating to the killing or removal of bacteria, viruses, and microbials are also provided.Type: ApplicationFiled: November 11, 2003Publication date: August 19, 2004Inventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Patent number: 6753307Abstract: A detergent composition comprising from about 4% to about 70% of a surfactant, and from about 0.05% to about 10% of a dye maintenance polymer or oligomer having at least three net positive chages per molecule. The dye maintenance polymer should have a Dye Maintenance Parameter, as determined by the Dye Maintenance Parameter Test defined herein, of greater than about 0.23. Further, the dye maintenance polymer is not a polyethyleneimine or alkoxylated derivative thereof.Type: GrantFiled: July 11, 2001Date of Patent: June 22, 2004Assignee: The Procter & Gamble CompanyInventors: Rajan Keshav Panandiker, Sherri Lynn Randall, Janet Sue Littig, Eugene Paul Gosselink, David William Bjorkquist
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Patent number: 6733538Abstract: The present invention relates to laundry detergent compositions providing dye protection benefits to fabric comprising: a) from about 4% to about 70% by weight, of a surfactant; b) from about 0.01% by weight, of a dye maintenance polymer or oligomer, said polymer or copolymer comprising one or more linearly polymerizing monomers, cyclically polymerizing monomers, and mixtures thereof; and c) the balance carriers and adjunct ingredients.Type: GrantFiled: August 29, 2001Date of Patent: May 11, 2004Assignee: The Procter & Gamble CompanyInventors: Rajan Keshav Panandiker, Sherri Lynn Randall, Janet Sue Littig, Eugene Paul Gosselink, David William Bjorkquist
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Publication number: 20030217963Abstract: A filter for providing potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter mateial formed at least in part from a plurality of mesoporous, basic, and reduced-oxygen activated carbon filter particles.Type: ApplicationFiled: June 18, 2003Publication date: November 27, 2003Applicant: The Procter & Gamble CompanyInventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Publication number: 20030217967Abstract: A process for producing a water filter material is provided. The process includes the steps of providing a plurality of mesoporous activated carbon particles, and treating said plurality of mesoporous activated carbon particles to produce a plurality of mesoporous activated carbon particles having a bulk oxygen percentage by weight of less than about 2.3%.Type: ApplicationFiled: June 18, 2003Publication date: November 27, 2003Applicant: The Procter & Gamble CompanyInventors: Michael Donovan Mitchell, Dimitris Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley, Thomas Joseph Wehmeier
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Publication number: 20030038084Abstract: A filter for providing potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing which is formed at least in part from a plurality of filter particles. The filter particles have a point of zero charge greater than about 7 and the sum of the mesopore and macropore volumes of the plurality of filter particles is greater than about 0.12 mL/g.Type: ApplicationFiled: August 23, 2001Publication date: February 27, 2003Applicant: The Procter & Gamble CompanyInventors: Michael Donovan Mitchell, Dimitrls Ioannis Collias, David William Bjorkquist, Piyush Narendra Zaveri, Matthew Morgan Woolley
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Patent number: 6433245Abstract: The present invention relates to a flushable fibrous structure that is particularly useful as a disposable tissue product and as a component (e.g., topsheets) for absorbent articles such as catamenial pads, diapers, incontinent articles and the like. The invention specifically relates to a flushable fibrous structure that has an in-use wet tensile strength of at least about 100 g/in. and a disposal wet tensile strength of not more than about 30 g/in. The invention also relates to absorbent articles comprising the fibrous structures, and methods for making the structures.Type: GrantFiled: June 12, 2000Date of Patent: August 13, 2002Assignee: The Procter & Gamble CompanyInventors: David William Bjorkquist, Todd Leon Mansfield
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Patent number: 6127593Abstract: The present invention relates to a flushable fibrous structure that is particularly useful as a disposable tissue product and as a component (e.g., topsheets) for absorbent articles such as catamenial pads, diapers, incontinent articles and the like. The invention specifically relates to a flushable fibrous structure that has an in-use wet tensile strength of at least about 100 g/in. and a disposal wet tensile strength of not more than about 30 g/in. The invention also relates to absorbent articles comprising the fibrous structures, and methods for making the structures.Type: GrantFiled: November 25, 1997Date of Patent: October 3, 2000Assignee: The Procter & Gamble CompanyInventors: David William Bjorkquist, Todd Leon Mansfield