Patents by Inventor Michael Persson

Michael Persson 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).

  • Publication number: 20100186917
    Abstract: The present invention relates to a filler composition comprising a) a filler, b) a cationic inorganic compound, c) a cationic organic compound, and d) an anionic polysaccharide, wherein the filler is present in an amount of at least about 1% by weight, based on the total weight of the composition, the anionic polysaccharide is present in an amount of about 1 to about 100 kg/ton, based on the weight of filler, and wherein the composition is substantially free from fibers.
    Type: Application
    Filed: July 14, 2008
    Publication date: July 29, 2010
    Applicant: AKZO NOBEL N.V.
    Inventors: Patrik Simonson, Michael Persson
  • Publication number: 20100170419
    Abstract: The invention relates to a sol containing silica-based particles having an axial ratio of at least about 10 and specific surface area of at least about 600 m2/g. The invention further relates to a sol containing silica-based particles having an axial ratio of at least about 10 and S-value up to about 25. The invention further relates to a sol containing silica-based particles having an axial ratio of at least about 10 and a specific surface area of at least about 400 m2/g, wherein the silica-based particles are surface-modified. The invention further relates to a sol containing silica-based particles having a viscosity of at least 50 cP and silica content of at least about 3% by weight, wherein the silica-based particles have a specific surface area of at least about 400 m2/g.
    Type: Application
    Filed: June 4, 2008
    Publication date: July 8, 2010
    Applicant: AKZO NOBEL N.V.
    Inventors: Michael Persson, Freddie Hansson, Annika Viola Pal, Lars Lindahl, Joakim Carlën
  • Patent number: 7670460
    Abstract: A process for the production of paper which includes the steps of providing an aqueous suspension containing cellulosic fibers, and optional fillers; adding to the suspension: (a) at least one charged organic polymer; and (b) an aqueous sol containing silica-based particles; wherein the sol has: (i) an S-value within the range of from 10 to 45%; (ii) a viscosity within the range of from 5 to 40 cP; and (iii) a molar ratio of SiO2 to M2O, where M is alkali metal or ammonium, within the range of from 10:1 to 40:1; and (III) forming and draining the suspension on a wire.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: March 2, 2010
    Assignee: Akzo Nobel N.V.
    Inventors: Michael Persson, Marek Tokarz, Maj-Lis Dahlgren
  • Patent number: 7662306
    Abstract: The present invention generally relates to polysilicate microgels. More specifically, the invention relates to a process for preparing aqueous polysilicate microgels which comprises mixing an aqueous solution of alkali metal silicate with an aqueous phase of silica-based material having a pH of 11 or less, to polysilicate microgels per se and to the use thereof as flocculating agents in paper making and water purification. The invention further relates to a process for the production of paper from a suspension of cellulosic fibers, and optional filler, which comprises adding to the suspension at least one cationic or amphoteric organic polymer and a polysilicate microgel, forming and draining the suspension on a wire.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: February 16, 2010
    Assignee: Akzo Nobel NV
    Inventors: Michael Persson, Bozena Stanislawa Tokarz, Maj-lis Dahlgren, Hans Johansson-Vestin
  • Publication number: 20090165727
    Abstract: The present invention refers to a milking arrangement for milking an animal during a milking operation. The arrangement includes a stationary structure and a milking member (5) including at least one teatcup to be attached to a teat of the animal to be milked. A long milk conduit (10) extends from the milking member and is adapted to be connected to a milking machine. A support device includes a stationary rail element (18), which is mounted to the stationary structure, and a support arm (17a, 17b), which extends in parallel to an arm axis (x) and to which the milking member is attached. The support arm is connected to the rail element in such a way that the support arm during the milking operation is freely movable on the rail element along the rail axis.
    Type: Application
    Filed: January 10, 2006
    Publication date: July 2, 2009
    Applicant: DELAVAL HOLDING AB
    Inventors: Torbjorn Petterson, Christoffer Hagglund, Michael Persson
  • Publication number: 20080202429
    Abstract: The invention refers to a milking device for milking an animal during a milking operation. A milking member (5) includes at least one teatcup (6) to be attached to a teat of the animal. A long milk conduit (10) extends from the milking member for being connected to a milking machine. A support device (15) comprises a mounting device (16) mounted to a stationary structure (2), and a support arm (17a) in parallel to an arm axis and connected to the mounting device. The milking member is freely movable along the support arm. The milking member is attached to the support arm and displaceable on the support arm. The support arm includes a primary arm element (17a?) connected to the mounting device and a secondary arm element (17a?) holding the milking member. The primary arm element is telescopically introduceable into the secondary arm element, which is displaceable on the primary arm element.
    Type: Application
    Filed: January 10, 2006
    Publication date: August 28, 2008
    Applicant: DELAVAL HOLDING AB
    Inventors: Christoffer Hagglund, Torbjorn Petterson, Michael Persson
  • Patent number: 7318881
    Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibers, and optional fillers, a sizing dispersion comprising a polymer having an aromatic group, and a sizing promoter comprising a polymer having an aromatic group, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: January 15, 2008
    Assignee: Akzo Nobel N.V.
    Inventors: Erik Lindgren, Sten Frölich, Michael Persson, Barbro Magnusson
  • Publication number: 20070095493
    Abstract: A process for the production of paper which includes the steps of providing an aqueous suspension containing cellulosic fibers, and optional fillers; adding to the suspension: (a) at least one charged organic polymer; and (b) an aqueous sol containing silica-based particles; wherein the sol has: (i) an S-value within the range of from 10 to 45%; (ii) a viscosity within the range of from 5 to 40 cP; and (iii) a molar ratio of SiO2 to M2O, where M is alkali metal or ammonium, within the range of from 10:1 to 40:1; and (III) forming and draining the suspension on a wire.
    Type: Application
    Filed: December 20, 2006
    Publication date: May 3, 2007
    Applicant: AKZO NOBEL N.V.
    Inventors: Michael Persson, Marek Tokarz, Maj-Lis Dahlgren
  • Patent number: 7169261
    Abstract: An aqueous sol containing silica-based particles which has an S-value within the range of from 10 to 45%, a viscosity within the range of from 5 to 40 cP, and a molar ratio of SiO2 to M2O, where M is alkali metal or ammonium, within the range of from 10:1 to 40:1, or a silica content of at least 10% by weight. The invention further relates to a process for the production of silica-based particles comprising the steps of: (a) acidifying an aqueous silicate solution to a pH of from 1 to 4 to form an acid sol; (b) alkalising the acid sol at an SiO2 content within the range of from 4.5 to 8% by weight to; (c) allowing particle growth of the alkalised sol for at least 10 minutes, or heat-treating the alkalised sol at a temperature of a least 30° C.; and then (d) alkalising the obtained sol to a pH of at least 10.0.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: January 30, 2007
    Assignee: Akzo Nobel N.V.
    Inventors: Michael Persson, Marek Tokarz, Maj-Lis Dahlgren
  • Publication number: 20050113462
    Abstract: A process for the production of an aqueous sol containing silica-based particles which comprises (a) acidifying an aqueous silicate solution to a pH of from 1 to 4 to form an acid sol; (b) alkalising the acid sol at an SiO2 content within the range of from 4.5 to 8% by weight; (c) allowing particle growth of the alkalised sol for at least 10 minutes; or heat-treating the alkalised sol at a temperature of a least 30° C.; (d) alkalising the obtained sol to a pH of at least 10.0; and (e) optionally concentrating the sol obtained according to (b), (c) or (d) to provide an aqueous sol containing silica-based particles and having a specific surface area of at least 90 m2/g aqueous sol; as well as an aqueous sol containing silica-based particles obtainable by the process.
    Type: Application
    Filed: January 8, 2005
    Publication date: May 26, 2005
    Inventors: Michael Persson, Marek Tokarz, Maj-Lis Dahlgren, Hans Johansson-Vestin
  • Patent number: 6846384
    Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibers, and optional fillers, an anionic or cationic sizing dispersion, and a sizing promoter comprising a cationic organic polymer having an aromatic group; and an anionic polymer having an aromatic group selected from step-growth polymers, polysaccharides and naturally occurring aromatic polymers, wherein the sizing dispersion and sizing promoter are added separately to the aqueous suspension.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: January 25, 2005
    Assignee: Akzo Nobel N.V.
    Inventors: Erik Lindgren, Sten Frölich, Michael Persson
  • Patent number: 6818100
    Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibres, and optional fillers, a sizing dispersion comprising a polymer having an aromatic group, and a sizing promoter comprising a polymer having an aromatic group, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: November 16, 2004
    Assignee: Akzo Nobel N.V.
    Inventors: Erik Lindgren, Sten Frölich, Michael Persson, Barbro Magnusson
  • Publication number: 20040206467
    Abstract: A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibres, and optional fillers, a sizing dispersion comprising a polymer having an aromatic group, and a sizing promoter comprising a polymer having an aromatic group, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension.
    Type: Application
    Filed: May 10, 2004
    Publication date: October 21, 2004
    Inventors: Erik Lindgren, Sten Frolich, Michael Persson, Barbro Magnusson
  • Patent number: 6673208
    Abstract: The present invention relates to polysilicate microgels, their preparation and use in paper making and water purification, the polysilicate microgels being obtainable by a process which comprises bringing into contact (i) particles of a salt AB with an aqueous silicate or polysilicate solution, (ii) an ion A with an ion B in the presence of an aqueous silicate or polysilicate solution, whereby the salt AB is precipitating in the aqueous phase, or (iii) an ion A with an ion B in the presence of an aqueous silicate or polysilicate solution, whereby the ions A and B represent ions of a precipitable salt AB having a pKS value of at least 4, measured at 20° C. in water. The invention further relates to aqueous silicate or polysilicate solutions, their preparation and use as precursors for polysilicate microgels.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: January 6, 2004
    Assignee: Akzo Nobel N.V.
    Inventors: Michael Persson, Marek Tadeusz Tokarz, Rein Sikkar
  • Patent number: 6635210
    Abstract: A method of manufacturing a shell element (13) for an electronic device, said shell element (13) having a front part(5) and at least one part that is angled in relation to said front part (5). The shell element (13) further comprises a formed sheet (6) that constitutes at least a part of the outer surface of said front part (5) and at least a part of said at least one part that is angled in relation to the front of the shell element (13). The method comprises the steps of first forming a sheet (1) to a desired shape including a part that is angled in relation to a front part (5) and then injection molding a plastics material on the back of the formed sheet (6). At least one opening (7) is provided in the angled part of the formed sheet (6) before the plastics material is injection molded on the back of the formed sheet (6) and the at least one opening (7) is left open during the injection molding of the plastics material on the back of the formed sheet (6).
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: October 21, 2003
    Assignee: Telefonaktiebolaget LM Ericsson(Publ)
    Inventors: Gert Nilsson, Michael Persson
  • Publication number: 20030024671
    Abstract: An aqueous sol containing silica-based particles which has an S-value within the range of from 10 to 45%, a viscosity within the range of from 5 to 40 cP, and a molar ratio of SiO2 to M2O, where M is alkali metal or ammonium, within the range of from 10:1 to 40:1, or a silica content of at least 10% by weight. The invention further relates to a process for the production of silica-based particles comprising the steps of: (a) acidifying an aqueous silicate solution to a pH of from 1 to 4 to form an acid sol; (b) alkalising the acid sol at an SiO2 content within the range of from 4.5 to 8% by weight to; (c) allowing particle growth of the alkalised sol for at least 10 minutes, or heat-treating the alkalised sol at a temperature of a least 30° C.; and then (d) alkalising the obtained sol to a pH of at least 10.0.
    Type: Application
    Filed: November 5, 2001
    Publication date: February 6, 2003
    Inventors: Michael Persson, Marek Tokarz, Maj-Lis Dahlgren
  • Publication number: 20030025103
    Abstract: The present invention generally relates to polysilicate microgels. More specifically, the invention relates to a process for preparing aqueous polysilicate microgels which comprises mixing an aqueous solution of alkali metal silicate with an aqueous phase of silica-based material having a pH of 11 or less, to polysilicate microgels per se and to the use thereof as flocculating agents in paper making and water purification. The invention further relates to a process for the production of paper from a suspension of cellulosic fibers, and optional filler, which comprises adding to the suspension at least one cationic or amphoteric organic polymer and a polysilicate microgel, forming and draining the suspension on a wire.
    Type: Application
    Filed: December 6, 1999
    Publication date: February 6, 2003
    Inventors: MICHAEL PERSSON, BOZENA STANISLAWA TOKARZ, MAJ-LIS DAHLGREN, HANS JOHANSSON-VESTIN
  • Publication number: 20030019599
    Abstract: The present invention relates to an aqueous dispersion of a sizing agent comprising starch having aromatic groups and an anionic polyelectrolyte, wherein the starch has a total amount of amylose of at least about 22% by weight based on total starch.
    Type: Application
    Filed: February 8, 2002
    Publication date: January 30, 2003
    Inventors: John Nicholass, Fredrik Solhage, Erik Lindgren, Sten Frolich, Michael Persson, Nicholas Morgan
  • Publication number: 20030017271
    Abstract: The invention relates to an aqueous slurry or dispersion of pigment particles comprising as dispersant an amphiphilic polymer at least partly adsorbed to the pigment particles, wherein the slurry or dispersion exhibits a temperature dependent viscosity in such way that the viscosity increases at least with a factor of about 2 when the temperature is raised from about 20 up to about 100° C. The invention further relates to a the preparation of the slurry or dispersion, a coating color composition, a process for its preparation, and a process for preparing coated paper or board.
    Type: Application
    Filed: June 26, 2002
    Publication date: January 23, 2003
    Applicant: AKZO NOBEL N.V.
    Inventors: Rein Sikkar, Olof Eriksson, Michael Persson
  • Publication number: 20020179267
    Abstract: The present invention relates to polysilicate microgels, their preparation and use in paper making and water purification, the polysilicate microgels being obtainable by a process which comprises bringing into contact (i) particles of a salt AB with an aqueous silicate or polysilicate solution, (ii) an ion A with an ion B in the presence of an aqueous silicate or polysilicate solution, whereby the salt AB is precipitating in the aqueous phase, or (iii) an ion A with an ion B in the presence of an aqueous silicate or polysilicate solution, whereby the ions A and B represent ions of a precipitable salt AB having a pKS value of at least 4, measured at 20° C. in water. The invention further relates to aqueous silicate or polysilicate solutions, their preparation and use as precursors for polysilicate microgels.
    Type: Application
    Filed: July 1, 2002
    Publication date: December 5, 2002
    Inventors: Michael Persson, Marek Tadeusz Tokarz, Rein Sikkar