Patents by Inventor Lars Lindahl
Lars Lindahl 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: 20240140243Abstract: The present invention relates to a method for providing ancillary services to an electrical grid. The ancillary services are related to frequency reserve provision, voltage and/or reactive power control and peak power reduction. The method is based a fleet of vehicles, partly driven by electrical power and comprises a step of changing the mode of operation for the vehicles and thereby altering the available electrical power in the electrical grid.Type: ApplicationFiled: January 9, 2024Publication date: May 2, 2024Applicant: Gridlynx ABInventors: Martin Lindahl, Lars Herre
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Patent number: 9487917Abstract: 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: GrantFiled: September 24, 2014Date of Patent: November 8, 2016Assignee: AKZO NOBEL N.V.Inventors: Michael Persson, Freddie Hansson, Annika Viola Pal, Lars Lindahl, Joakim Carlén
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Publication number: 20150007956Abstract: 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: ApplicationFiled: September 24, 2014Publication date: January 8, 2015Applicant: AKZO NOBEL N.V.Inventors: Michael PERSSON, Freddie HANSSON, Annika Viola PAL, Lars LINDAHL, Joakim CARLÉN
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Patent number: 8846772Abstract: 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: GrantFiled: June 4, 2008Date of Patent: September 30, 2014Assignee: Akzo Nobel N.V.Inventors: Michael Persson, Freddie Hansson, Annika Viola Pal, Lars Lindahl, Joakim Carlén
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Publication number: 20100170419Abstract: 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: ApplicationFiled: June 4, 2008Publication date: July 8, 2010Applicant: AKZO NOBEL N.V.Inventors: Michael Persson, Freddie Hansson, Annika Viola Pal, Lars Lindahl, Joakim Carlën
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Patent number: 5800603Abstract: An aqueous dispersion comprising particles of a zeolite having a hydrophobicity of below about 9.0 percent by weight residual butanol as determined by the Residual Butanol Test, which dispersion comprises a stabilizing amount of biogum. Production of the dispersion comprising mixing zeolite particles with a biogum into a dry mixture; and mixing the dry mixture with water under agitation into a homogeneous mixture. Use of the dispersion for binding particles of zeolite to fibers. Production of paper or paperboard by forming and dewatering a suspension of cellulosic fibers wherein dewatering is carried out in the presence of particles of a zeolite, the dispersion being added to the suspension prior to dewatering. Production of dry-laid paper, nonwoven or fluff pulp, in which cellulosic fibers are carried by a gas stream, in which the dispersion is sprayed onto the fibers while they are carried by the gas stream.Type: GrantFiled: March 24, 1997Date of Patent: September 1, 1998Assignee: Eka Chemicals ABInventors: Ylva Cruslock, Maj-Lis Dahlgren, Lars Lindahl
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Patent number: 5487685Abstract: The invention concerns an electrical contact nut (1) primarily intended to be welded to a sheet steel component (8) of a motor vehicle, and comprising a first, preferably cylindrical portion (2) and a second, wider portion (3) at one end of the first portion (2). On its side facing the first portion (2), the second portion (3) is provided with an annular member (4) of a weldable material. By means of its first portion (2), the nut (1) may be introduced into an aperture (7) formed in the sheet metal component (8) until the annular welding member (4) abuts against the sheet metal component (8). In this position, the nut may be welded to the component (8).Type: GrantFiled: June 7, 1995Date of Patent: January 30, 1996Assignee: AB VolvoInventors: Ola Stillback, Lars Lindahl
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Patent number: 4646821Abstract: A gasket groove at plate elements of plate heat exchangers, characterized in that a first gasket groove of a plate element (1; 2), as seen in cross section, extends between the limiting planes of the element and has an elevation (3) arranged in the bottom of the groove, which elevation forms a cavity on the other side of the groove and consequently also the element, which cavity forms a second gasket groove cooperating with a corresponding cavity (3) of an adjacent, reversed first gasket groove of a second plate element (2; 1).Type: GrantFiled: December 10, 1984Date of Patent: March 3, 1987Assignee: ReHeat ABInventors: Christer Almqvist, Lars Lindahl
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Patent number: 4635714Abstract: The invention relates to a packing groove in a plate member for a heat exchanger, especially to a packing groove at the inlet and outlet portions of the plate member. The bottom of the packing groove includes according to the invention strengthening bars, which are embossed in the bottom of the packing groove and extend substantially along the groove.Type: GrantFiled: October 20, 1982Date of Patent: January 13, 1987Assignee: ReHeat ABInventors: Christer Almqvist, Bengt Carlsson, Lars Lindahl
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Patent number: 4482089Abstract: The invention relates to a method of lining a connection opening for fluid in a frame plate of a plate heat exchanger. A pipe socket with a diameter corresponding to the diameter of the opening is provided with a flange and placed in the opening, and the flange abutting the undepressed area about the opening on the inside of the plate has a thickness not exceeding 1 mm. On the outside of the plate the portion of the socket projecting there is provided with a flange to abut the undepressed area about the opening on the other side of the plate.Type: GrantFiled: October 18, 1982Date of Patent: November 13, 1984Assignee: Reheat ABInventors: Lars Lindahl, Bengt Carlsson
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Patent number: 4434643Abstract: The invention relates to a method of embossing heat exchanger plates in several steps by a pressing tool, in that after a portion of the sheet blank has been embossed a subsequent portion of the blank is embossed, after this has been positioned and fixed in place between the punch and the die of the press. The positioning and clamping takes place in such a manner that a groove with zigzag extension pressed at the preceding embossing step in the sheet is caused to engage between a groove and, respectively, a bead arranged in the punch and the die which prior to the embossing are moved against each other and inside of the plane of the punch and, respectively, die by spring force.Type: GrantFiled: December 31, 1981Date of Patent: March 6, 1984Assignee: ReHeat ABInventors: Christer Almqvist, Lars Lindahl
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Patent number: 4284135Abstract: The gasket grooves of plate elements are disposed in an intermediate plane. The gasket then will abut the distance members of both adjacent plate elements in its own gasket groove and parts of the respective distance members. The plate elements are fixed relative to each other when the plate elements are clamped together. The gaskets act as guide strips.Type: GrantFiled: February 22, 1980Date of Patent: August 18, 1981Assignee: ReHeat ABInventors: Christer Almqvist, Lars Lindahl