Patents by Inventor Anna Malmstrom
Anna Malmstrom 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: 20140133006Abstract: A fixed image display device is disclosed, having an opaque insulating layer, a continuous electrolyte layer behind said insulating layer, a pixilated electrochemically active and electrochromic layer between the electrolyte layer and the insulating layer, and a pixilated electronically conductive counter electrode layer between the electrolyte layer and the insulating layer. The electrochromic layer and the counter electrode layer have a lateral arrangement, and are in ionic contact with each other. Moreover, the insulating layer includes passages having an electronic conductor. At least one continuous motif electrode segment arranged behind the insulating layer, and electronically connected to at least two pixel elements of the electrochromic layer via the electronic conductors; and at least one continuous background electrode segment arranged behind the insulating layer, and electronically connected to at least two pixel elements of the counter electrode layer via electronic conductors.Type: ApplicationFiled: November 1, 2013Publication date: May 15, 2014Applicant: ACREO SWEDISH ICT ABInventor: Anna MALMSTRÖM
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Patent number: 8243356Abstract: The authenticity of a security document, such as a bank note, is verified by use of a security feature arranged in or on the document, which security feature comprises an antenna arranged to receive EM-radiation from an external energy source; a rectifier arranged to receive electric energy from the antenna and convert it into a rectified current; and an electrochromic display arranged to alter its electrochromic state in response to said rectified current. Hence, a security feature able alter its appearance in response to EM-radiation is provided, which comprises a display that can be given a large variety of two dimensional shapes.Type: GrantFiled: April 30, 2008Date of Patent: August 14, 2012Assignee: De la Rue International LimitedInventors: Mats Robertsson, Petronella Norberg, Xin Wang, Staffan Nordlinder, Anna Malmström, Lars-Olov Hennerdal, James Peter Snelling, Philip George Cooper
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Publication number: 20120126931Abstract: This invention relates to an electrolyte composition comprising an ionic liquid, a gellant selected from a cellulose derivative, gelatine and combinations thereof, and a radiation-curabie base.Type: ApplicationFiled: March 12, 2010Publication date: May 24, 2012Applicant: SERICOL LIMITEDInventors: Adam Joseph Howard Batting, Timothy Geoffrey Owen, Mats Standberg, Anurak Sawatdee, Xin Wang, Anna Malmstrom, Marie Nilsson, Lars-Olov Hennerdal
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Patent number: 7736489Abstract: A process for rendering an electrically conducting polymer essentially non-conducting is provided, in which the polymer is brought into direct electrical contact with an electrolyte. Furthermore, an electric voltage is applied to the polymer using at least two electrodes connected to a voltage supply, each electrode independently being in electrical contact with one of the polymer and the electrolyte. The electrically conducting polymer is rendered non-conducting through electrochemical reactions occurring in the interface between the polymer and the electrolyte in response to the electric voltage.Type: GrantFiled: September 13, 2002Date of Patent: June 15, 2010Assignee: Acreo ABInventors: Lars-Olov Hennerdal, Tommi Remonen, Jessica Häll, Anna Malmström, Magnus Berggren, Thomas Kugler, Luc Leenders, Johan Lamotte
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Publication number: 20100118378Abstract: The authenticity of a security document, such as a bank note, is verified by use of a security feature arranged in or on the document, which security feature comprises an antenna arranged to receive EM-radiation from an external energy source; a rectifier arranged to receive electric energy from the antenna and convert it into a rectified current; and an electrochromic display arranged to alter its electrochromic state in response to said rectified current. Hence, a security feature able alter its appearance in response to EM-radiation is provided, which comprises a display that can be given a large variety of two dimensional shapes.Type: ApplicationFiled: April 30, 2008Publication date: May 13, 2010Inventors: Mats Robertsson, Petronella Norberg, Xin Wang, Staffan Nordlinder, Anna Malmström, Lars-Olov Hennerdal, James Peter Snelling, Philip George Cooper
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Patent number: 7489431Abstract: An electrochromic device is disclosed, including two electrochromic elements, which are switched in a time separated manner. Each electrochromic element is arranged of electrochemically active material, and connected to a counter layer by a solidified electrolyte. In at least one embodiment, the electrochromic device further includes at least one resistive device which restricts the electrochemical reaction of one of the electrochromic element, such that a color of this electrochromic element is not substantially altered until the other electrochromic element is reacted to a predetermined extent.Type: GrantFiled: November 8, 2007Date of Patent: February 10, 2009Assignee: Acreo ABInventors: Anna Malmström, David A. Nilsson
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Publication number: 20080130086Abstract: An electrochromic device is disclosed, including two electrochromic elements, which are switched in a time separated manner. Each electrochromic element is arranged of electrochemically active material, and connected to a counter layer by a solidified electrolyte. In at least one embodiment, the electrochromic device further includes at least one resistive device which restricts the electrochemical reaction of one of the electrochromic element, such that a color of this electrochromic element is not substantially altered until the other electrochromic element is reacted to a predetermined extent.Type: ApplicationFiled: November 8, 2007Publication date: June 5, 2008Inventors: Anna Malmstrom, David A. Nilsson
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Patent number: 7301687Abstract: An electrochemically active element is provided which comprises a first layer of PEDOT-PSS mixed with an adhesion promoter, and a second layer of PANI which is in direct electrical contact with said first layer. Such an element exhibits a substantially increased resistance from being overoxidized, as well as an electrical conductivity which is virtually the same as for pure PEDOT-PSS, and substantially better than for pure PANI. The electrochemically active element can be used in e.g. electrochemical pixel devices, transistors, diodes etc.Type: GrantFiled: December 5, 2006Date of Patent: November 27, 2007Assignee: Acreo ABInventors: Magnus Berggren, Thomas Kugler, Tommi Remonen, Jessica Häll, Anna Malmström
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Publication number: 20070076287Abstract: An electrochemically active element is provided which comprises a first layer of PEDOT-PSS mixed with an adhesion promoter, and a second layer of PANI which is in direct electrical contact with said first layer. Such an element exhibits a substantially increased resistance from being overoxidised, as well as an electrical conductivity which is virtually the same as for pure PEDOT-PSS, and substantially better than for pure PANI. The electrochemically active element can be used in e.g. electrochemical pixel devices, transistors, diodes etc.Type: ApplicationFiled: December 5, 2006Publication date: April 5, 2007Applicant: ACREO ABInventors: Magnus Berggren, Thomas Kugler, Tommi Remonen, Jessica Hall, Anna Malmstrom
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Patent number: 7158277Abstract: An electrochromic device is provided comprising: (i) at least one material that is electrically conducting in at least one oxidation state and (ii) at least one electrochromic material, wherein said materials (i) and (ii) can be the same or different; at least one layer of a solidified electrolyte which is in direct electrical contact with said electrochromic element; and at least two electrodes comprising PEDOT-PSS, arranged side by side in a common plane and adapted for application of a voltage therebetween, one of said electrodes being in direct electrical contact with a component selected from said electrochromic element(s) and the other electrode(s) being in direct electrical contact with a component selected from said electrolyte layer(s) and said electrochromic element(s).Type: GrantFiled: March 7, 2003Date of Patent: January 2, 2007Assignee: ACREO ABInventors: Magnus Berggren, Thomas Kugler, Tommi Remonen, Jessica Häll, Anna Malmström
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Publication number: 20050068603Abstract: An electrochromic device is provided comprising: at least one electrochromic element comprising (i) at least one material that is electrically conducting in at least one oxidation state and (ii) at least one electrochromic material, wherein said materials (i) and (ii) can be the same or different; at least one layer of a solidified electrolyte which is in direct electrical contact with said electrochromic element; and at least two electrodes comprising PEDOT-PSS, arranged side by side in a common plane and adapted for application of a voltage therebetween, one of said electrodes being in direct electrical contact with a component selected from said electrochromic element(s) and the other electrode(s) being in direct electrical contact with a component selected from said electrolyte layer(s) and said electrochromic element(s).Type: ApplicationFiled: March 7, 2003Publication date: March 31, 2005Inventors: Magnus Berggren, Thomas Kugler, Tommi Remonen, Jessica Hall, Anna Malmstrom
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Publication number: 20040188656Abstract: A process for rendering an electrically conducting polymer essentially non-conducting is provided, in which the polymer is brought into direct electrical contact with an electrolyte. Furthermore, an electric voltage is applied to said polymer using at least two electrodes connected to a voltage supply, each electrode independently being in electrical contact with one of said polymer and said electrolyte. Said electrically conducting polymer is rendered non-conducting through electrochemical reactions occurring in the interface between said polymer and said electrolyte in response to said electric voltage.Type: ApplicationFiled: May 7, 2004Publication date: September 30, 2004Inventors: Lars-Olov Hennerdal, Tommi Remonen, Jessica Hall, Anna Malmstrom, Magnus Berggren, Thomas Kugler, Luc Leenders, Johan Lamotte