Patents by Inventor Christer Bergstrom
Christer Bergstrom 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: 20230216096Abstract: A battery assembly for an electric vehicle including a first battery unit, a DC/DC converter, and a battery receptacle for selectively receiving a second battery unit. The first battery unit is electrically connected to the DC/DC converter. Moreover, a first electric connection interface is positioned in the battery receptacle and is electrically connected to the DC/DC converter. Additionally, a vehicle including such a battery assembly is presented. Furthermore, a method for operating an electric vehicle is explained. A first operational mode includes electrically connecting the first battery unit to an electric traction machine and electrically connecting the second battery unit to the first battery unit. A second operational mode includes electrically connecting the second battery unit to the electric traction machine.Type: ApplicationFiled: December 23, 2022Publication date: July 6, 2023Inventors: Thomas BERNICHON, Dan ADAMSSON, Christer BERGSTRÖM, Patrik JOHANSSON, Robert ERIKSSON, Ida TOFTEFORS
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Publication number: 20040176548Abstract: A thermoplastic elastomer. It is produced by impregnating a heat resistant polycondenzation copolymer containing soft segments with acrylate monomers and radical initiators and polymerizing the monomers inside the pellets. By incorporating a cross-linked polyacrylate phase into a block-elastomer based on an engineering polymer, such as polyester, polyamide or polyurethane, softer compounds having excellent heat and oil resistance are obtained.Type: ApplicationFiled: December 24, 2003Publication date: September 9, 2004Inventors: Tomi Heiskanen, Christer Bergstrom, Johanna Lampinen, Ville Nurminen
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Patent number: 6566570Abstract: A process for producing an unsaturated cyclic compound, comprising the steps of hydrochlorinating a terpene to produce a hydrochlorinated terpene, and subjecting the hydrochlorinate terpene to elimination of hydrogen chloride to form an unsaturated cyclic compound. The terpene is preferably &agr;-pinene, &bgr;-pinene, camphene or suitable turpentine fraction. The cyclic compounds can be used as monomers and by means of the invention it is thus possible to produce plastics from renewable raw material sources.Type: GrantFiled: August 4, 2000Date of Patent: May 20, 2003Assignee: Optatech CorporationInventors: Christer Bergström, Arto Mölsä, Juhana Ruotoistenmäki
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Publication number: 20030023124Abstract: This invention concerns an alkylation process. According to the process a side-chain of a substituted aromatic compound is alkylated by reacting the aromatic compound with an alkylating agent in the presence of a catalyst. According to the invention, the catalyst comprises a restructured smectite clay to which basic ions are incorporated by ion-exchange.Type: ApplicationFiled: July 24, 2002Publication date: January 30, 2003Inventors: Adriana De Stefanis, Giorgio Perez, Anthony Tomlinson, Christer Bergstrom
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Patent number: 6472576Abstract: A process for producing 2,6-dimethylnapthalene from 1-(p-tolyl)-2-methylbutane, 1-(p-tolyl)-2-methylbutene or a mixture thereof by dehydrocyclization in the presence of a catalyst, comprising using non-acidic activated carbon as a catalyst.Type: GrantFiled: June 1, 2001Date of Patent: October 29, 2002Assignee: Optatech CorporationInventors: Christer Bergström, Marita Niemelä
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Patent number: 6294706Abstract: Disclosed is a method for the preparation of norbornene and substituted norbornene compounds via a Diels-Alder reaction, in which a cyclic diene is reacted with an olefinic compound in order to prepare a norbornene compound. According to the invention a cyclic diene is gradually added to react with an olefinic compound, in order to keep the concentration of the cyclic diene in the reaction mixture as low as possible during the reaction. It is possible to obtain a very pure product, high yield, short reaction time and high concentrations of the exo diastereomer with the method of the invention.Type: GrantFiled: October 29, 1998Date of Patent: September 25, 2001Assignee: Opatatech CorporationInventors: Christer Bergström, Jukka Koskinen, Erkki Halme, Matti Lindström, Mika Perälä
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Patent number: 6262177Abstract: Disclosed is a process for producing a polymer blend wherein a first phase containing a polyacrylate polymer prepared by radical polymerization and a source of radicals, and a second phase containing a polyolefin polymer are compounded by melt processing.Type: GrantFiled: December 14, 1999Date of Patent: July 17, 2001Assignee: Optatech CorporationInventors: Christer Bergström, Tomi Heiskanen
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Patent number: 5929168Abstract: The present invention concerns polymer blends and processes for the preparation thereof. The present blends contain a) 5 to 95 parts by weight of poly(2,6-dimethyl-1,4-phenylene)ether, b) 95 to 5 parts by weight of a second polymer which is immiscible therewith, and c) a component (a compatibilizer) which enhances the compatibility of the polymers. According to the invention the component enhancing the compatibility of the polymers comprises 0.1 to 10%, preferably about 1.5 to 10%, calculated on basis of the total weight of components a and b, of at least one compound C, which has the formulaA.sub.i --B.sub.j IwhereinA stands for a group which contains at least one ring with 3 to 7 members, capable of forming ring-to-ring interactions with the phenyl rings of poly(2,6-dimethyl-1,4-phenylene)ether,B is a polar group,i is an integer 1 to 20, andj is an integer 0 to 20,whereati+j is greater than or equal to 2,the melting point of compound C is above 50.degree. C. and the boiling point thereof above 200.degree.Type: GrantFiled: November 19, 1996Date of Patent: July 27, 1999Assignee: Optatech, CorporationInventors: Olli Ikkala, Lars-Olof Pietila, Riitta Holsti-Miettinen, Nikitas Katsaras, Maaria Selantaus, Heidi Osterholm, Christer Bergstrom
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Patent number: 5854356Abstract: The invention relates to a polymer for release films of surfaces containing pressure-sensitive adhesives. The polymer includes a reactive polyolefin and a reactive release substance, which are chemically bonded together as a result of being compounded in a molten state. The invention also relates to a release film for surfaces containing pressure-sensitive adhesives.Type: GrantFiled: May 24, 1995Date of Patent: December 29, 1998Assignee: Neste OyInventors: Christer Bergstrom, Stefan Jakobsson, Marja-Leena Markkula, Ake Jafs, Inari Seppa
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Patent number: 5677394Abstract: A melt-processable block copolyesterimide comprising the repeating units (I), (II) and (III) and, optionally, a repeating unit (IV), wherein (I) is a repeating unit of the formula ##STR1## wherein R is an aliphatic polyether chain and/or a polysiloxane chain; (II) and (III) are repeating units of the formulas ##STR2## wherein Z is hydrogen, alkyl, alkoxy, aryl, halogen and w is zero or one; and (IV) is a repeating unit of the formula ##STR3## wherein Z' is hydrogen, alkyl, alkoxy, aryl or halogen and the phenylene ring is substituted in by Z' in the m- or p-positions. The repeating unit of formula (I) is present in an amount of 5 to 50 mole-%, the repeating unit of formula (II) is present in an amount of 10 to 80 mole-%, the repeating unit of formula (III) is present in an mount of 5 to 50 mole-% and the repeating unit of formula (IV) is present in an amount of 0 to 45 mole-% of the block copolyesterimide.Type: GrantFiled: April 28, 1995Date of Patent: October 14, 1997Assignee: Neste OYInventors: Frank Bohme, Doris Pospiech, Manfred Ratzsch, Christer Bergstrom, Mika Harkonen, Heli Alanko, Pentti Passiniemi
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Patent number: 5342887Abstract: The invention relates to a thermoplastic elastomer composition comprising a) a polyolefin and b) a crosslinked ethylene copolymer, the crosslinks between the main chains of the molecules of which have been formed of the hetero groups of at least two comonomer units being in different main chains and at least two hetero groups of the crosslinking-agent molecule being chemically attached to each other. The problem of such a mixture is that the lipophilic thermoplastic polyolefin and the ethylene copolymer to be crosslinked with its polar hetero groups are not compatible. Now, the problem has been solved by forming the crosslinks between the main chains so that either the hetero group of the comonomer unit in the main chain or then the hetero group of the crosslinking agent molecule always is a hydroxyl group, the hydroxyl group always forming a permanent oxygen crosslink bond with the other hetero group attached to it.Type: GrantFiled: December 23, 1992Date of Patent: August 30, 1994Assignee: Neste OyInventors: Christer Bergstrom, Gunilla Krook
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Patent number: 4990383Abstract: The invention concerns a plastic coated steel tube which contains at least one layer of a polyolefin which has been modified with a hydrolyzable silane, and also a method for preparing this tube.Type: GrantFiled: June 5, 1989Date of Patent: February 5, 1991Assignee: Neste OyInventors: Christer Bergstrom, Johan Von Knorring, Mikko Karttunen
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Patent number: 4937284Abstract: Modified polyolefin comprising a polyolefin linked to a hydrolyzable silane which is reactable with polyvinyl alcohol and being chemically bound to polyvinyl alcohol by the silane, and method for preparing the same.Type: GrantFiled: August 23, 1988Date of Patent: June 26, 1990Assignee: Neste OyInventor: Christer Bergstrom
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Patent number: 4877685Abstract: The present invention relates to a modified polyolefine which has good adhesion to metals and to polar substances. The polyolefine is admixed with or grafted to fumaric acid. The fumaric acid may be added at about 0.01-20%, preferably 0.01-1% of the polyolefine weight, while the preferred polyolefine is an ethylene copolymer.Type: GrantFiled: May 28, 1987Date of Patent: October 31, 1989Assignee: Neste OyInventors: Christer Bergstrom, Tor H. Palmgren
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Patent number: 4746704Abstract: The present invention relates to a chemically modified polyolefin exhibiting good adhesion to metals and other polar substances. The polyolefin has itaconic acid grafted thereto.Type: GrantFiled: November 18, 1986Date of Patent: May 24, 1988Assignee: Neste OyInventors: Christer Bergstrom, Barbro Bjorkvall, Bengt Stenlund, Jouko Huttunen, Carl-Johan Johansson
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Patent number: 4639398Abstract: Compound film containing polyolefin. Such a compound film comprises at least one polyolefin layer having good adhesiveness to polymers containing polar radicals. In order to make the adhesive polyolefin layer such that the adhesive layer contains no substances detrimental to health, the adhesive layer in the compound film of the invention consists of polyolefin which has been modified by grafting 0.01 to 10% of unsaturated alkoxysilane.Type: GrantFiled: September 13, 1984Date of Patent: January 27, 1987Assignee: Neste OyInventor: Christer Bergstrom
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Patent number: 4591606Abstract: The present invention concerns a foamed, silane-cross-linked polyolefin foam and a procedure for producing the same. The polyolefin foam contains 60-99.9% polyolefin, 0.1-10% chemically bound hydrolyzed silane, 0-5% condensing catalyst, 0.1-5% water and 0-20% water carrier substance. The polyolefin foam is produced by extruding a mixture which contans polyethylene, silane hydrolyzable with water, a condensing catalyst and a foaming agent. For the polyolefin to be extruded is used polyethylene containing 0.1-5% water as foaming agent and 0-20% water carrier substance.Type: GrantFiled: May 22, 1985Date of Patent: May 27, 1986Assignee: Neste OyInventor: Christer Bergstrom