Patents by Inventor Jan-Erik Otterstedt
Jan-Erik Otterstedt 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: 20240140809Abstract: A colloidal dispersion of particles of silica having a particle size of from 3 nm to 100 nm, to which ions of one or more metals are adsorbed, selected from metals having atomic numbers 21-31, 39-46, 48-50, 57-82, and 89-93, and a method for preparing the dispersion. The dispersion may be used in various fields of use of metals.Type: ApplicationFiled: June 8, 2023Publication date: May 2, 2024Applicant: PREBONA ABInventor: Jan-Erik OTTERSTEDT
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Patent number: 11771792Abstract: A method for reducing odor, by providing a colloidal dispersion of particles of silica having a particle size of from 3 nm to 100 nm, said particles having ions of one or more metals selected from copper, silver, zinc and iron adsorbed at the particle surface, and bringing at least one of said particles into contact with an odorous compound; and/or providing an aqueous silicate solution containing metal ions selected from ions of copper, silver, zinc and iron, and bringing at least one metal ion-carrying silicate particle formed in the solution into contact with an odorous compound. A composition for use in such a method and a product treated by such a composition.Type: GrantFiled: December 21, 2018Date of Patent: October 3, 2023Assignee: PREBONA ABInventor: Jan-Erik Otterstedt
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Patent number: 11679984Abstract: A colloidal dispersion of particles of silica having a particle size of from 3 nm to 100 nm, to which ions of one or more metals are adsorbed, selected from metals having atomic numbers 21-31, 39-46, 48-50, 57-82, and 89-93, and a method for preparing the dispersion. The dispersion may be used in various fields of use of metals.Type: GrantFiled: June 15, 2017Date of Patent: June 20, 2023Assignee: PREBONA ABInventor: Jan-Erik Otterstedt
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Publication number: 20210196738Abstract: The present invention relates to pharmaceutical compositions comprising colloidal dispersions of silica particles to which silver ions have been adsorbed in combination with therapeutically active agents. It is also related to a kit of parts, uses and medical methods of treatment involving said pharmaceutical compositions or the components of said pharmaceutical composition. The invention provides means for alternative treatment strategies for bacterial infections to lessen the need for traditional antibiotics.Type: ApplicationFiled: December 21, 2018Publication date: July 1, 2021Inventors: Claes AHLNECK, Dan ANDERSSON, Jan-Erik OTTERSTEDT
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Publication number: 20200289692Abstract: A method for reducing odor, by providing a colloidal dispersion of particles of silica having a particle size of from 3 nm to 100 nm, said particles having ions of one or more metals selected from copper, silver, zinc and iron adsorbed at the particle surface, and bringing at least one of said particles into contact with an odorous compound; and/or providing an aqueous silicate solution containing metal ions selected from ions of copper, silver, zinc and iron, and bringing at least one metal ion-carrying silicate particle formed in the solution into contact with an odorous compound. A composition for use in such a method and a product treated by such a composition.Type: ApplicationFiled: December 21, 2018Publication date: September 17, 2020Inventor: Jan-Erik OTTERSTEDT
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Publication number: 20200239322Abstract: A colloidal dispersion of particles of silica having a particle size of from 3 nm to 100 nm, to which ions of one or more metals are adsorbed, selected from metals having atomic numbers 21-31, 39-46, 48-50, 57-82, and 89-93, and a method for preparing the dispersion. The dispersion may be used in various fields of use of metals.Type: ApplicationFiled: June 15, 2017Publication date: July 30, 2020Inventor: Jan-Erik OTTERSTEDT
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Publication number: 20200231454Abstract: An aqueous silicate solution containing ions of metal having an atomic number selected from atomic numbers 21-31, 39-50, 57-82, and 89-93 and a process for preparing the solution. The solution is useful e.g. for forming metal containing coatings.Type: ApplicationFiled: July 23, 2018Publication date: July 23, 2020Inventor: Jan-Erik OTTERSTEDT
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Patent number: 9108854Abstract: A colloidal dispersion having carrier particles of silica having a particle size from 3 nm to 100 nm to which silver ions have been adsorbed, preferably in an amount of 0.0005-5 silver ions per nm2 of silica particle surface. The surface of the carrier particles of silica suitably contains aluminumsilicate sites. It also relates to a process for making a colloidal dispersion comprising providing a silica sol, adding a solution of silver nitrate to the silica sol under agitation yielding a colloidal dispersion with silver ions adsorbed on the surface of the silica particles. The dispersion is usable as a biocide in e.g. coatings, adhesives and sealants, in surface treatment and impregnation of organic materials, in surface treatment and impregnation of inorganic materials, in textiles, garments and shoes, in medical disposables, in plastics and rubbers, in water and air purification, and in crop protection.Type: GrantFiled: September 20, 2010Date of Patent: August 18, 2015Assignee: PREBONA ABInventor: Jan-Erik Otterstedt
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Publication number: 20120301553Abstract: A colloidal dispersion having carrier particles of silica having a particle size from 3 nm to 100 nm to which silver ions have been adsorbed, preferably in an amount of 0.0005-5 silver ions per nm2 of silica particle surface. The surface of the carrier particles of silica suitably contains aluminumsilicate sites. It also relates to a process for making a colloidal dispersion comprising providing a silica sol, adding a solution of silver nitrate to the silica sol under agitation yielding a colloidal dispersion with silver ions adsorbed on the surface of the silica particles. The dispersion is usable as a biocide in e.g. coatings, adhesives and sealants, in surface treatment and impregnation of organic materials, in surface treatment and impregnation of inorganic materials, in textiles, garments and shoes, in medical disposables, in plastics and rubbers, in water and air purification, and in crop protection.Type: ApplicationFiled: September 20, 2010Publication date: November 29, 2012Applicant: PREBONA ABInventor: Jan-Erik Otterstedt
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Patent number: 5863516Abstract: The present invention relates to colloidal suspensions of discrete particles of colloidal zeolite and a method for preparing such zeolite from clear tetraalkylammonium stabilized aluminiumsilicate solutions. Smaller amounts of well defined and controlled metal hydroxide solutions are added to these alumiumsilicate solutions to enable the synthesis of a specific zeolite as well as to control zeolite yield. The colloidal suspensions are characterized by an average particle size of less than 250 nanometers and preferably, less than 200 nanometers together with the fact that the particle size distribution expressed as the geometric standard deviation is less than 1.30 and preferably less than 1.20. Zeolite sols synthesized according to this invention display Tyndall light scattering typical for colloidal suspensions as well as a very low rate of sedimentation due to the small particle size.Type: GrantFiled: November 3, 1997Date of Patent: January 26, 1999Assignee: Exxon Chemical Patent Inc.Inventors: Jan-Erik Otterstedt, Per Johan Sterte, Brian J. Schoeman
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Patent number: 4800185Abstract: A process for treating a catalyst contaminated with at least one metal which was so contaminated while promoting conversion of a substantially hydrocarbon feedstock containing the metal comprising at least one of the following: (1) contacting the catalyst component to increase the ammonium ion-containing component to increase the ammonium ion content of the catalyst; and (2) contacting the catalyst with at least one rare earth metal ion-containing component to increase the rare earth metal ion content of the catalyst. Improved hydrocarbon conversion processes are also disclosed.Type: GrantFiled: August 28, 1987Date of Patent: January 24, 1989Assignee: ChemCat CorporationInventors: Frank J. Elvin, Jan-Erik Otterstedt, Jin S. Yoo
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Patent number: 4515903Abstract: A cracking catalyst having good resistance to metal poisoning has at least two particle fractions of different particle sizes, the cracking catalyzing zeolite material being concentrated to the coarser particle size fractions, and the finer particle size fractions being formed from material having relatively lower or no or insignificant cracking catalyzing activity. The particles of the finer particle size fractions have a matrix of kaolin and amorphous alumina-silica and may contain for example, an SO.sub.x eliminating additive such as Al.sub.2 O.sub.3, CaO and/or MgO. The coarser particle size fractions having cracking catalyzing effect have a mean particle size of from 80 to 125 .mu.m and the finer particle size fractions a mean particle size of from 30 to 75 .mu.m.Type: GrantFiled: February 17, 1984Date of Patent: May 7, 1985Assignee: Katalistiks B.V.Inventors: Jan-Erik A. Otterstedt, Sven G. Jaras, Roland Pudas, Lawrence L. Upson