Patents by Inventor Ian Chisem

Ian Chisem 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).

  • Patent number: 12186696
    Abstract: The present invention relates to a modular filter element comprising a first elongate hollow body, a second elongate hollow body and connection means for connecting the first elongate hollow body to the second elongate hollow body, wherein the connection means comprises a connection member that extends into a lower wall of the first elongate hollow body and into the upper wall of the second elongate hollow body to provide a gas-tight seal between the first elongate hollow body and the second elongate hollow body.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: January 7, 2025
    Assignee: MADISON FILTER 981 LIMITED
    Inventors: Detlef Hega, Ian Chisem, Purv Purohit
  • Publication number: 20210268419
    Abstract: The present invention relates to a modular ceramic filter element comprising two or more elongate hollow bodies, wherein the elongate hollow bodies are formed to define twist-lock connection means for joining adjacent elongate hollow bodies together.
    Type: Application
    Filed: June 18, 2019
    Publication date: September 2, 2021
    Applicant: MADISON FILTER 981 LIMITED
    Inventors: Detlef Hega, Ian Chisem, Purv Purohit
  • Publication number: 20210245085
    Abstract: The present invention relates to a modular filter element comprising a first elongate hollow body, a second elongate hollow body and connection means for connecting the first elongate hollow body to the second elongate hollow body, wherein the connection means comprises a connection member that extends into a lower wall of the first elongate hollow body and into the upper wall of the second elongate hollow body to provide a gas-tight seal between the first elongate hollow body and the second elongate hollow body.
    Type: Application
    Filed: June 18, 2019
    Publication date: August 12, 2021
    Applicant: MADISON FILTER 981 LIMITED
    Inventors: Detlef Hega, Ian Chisem, Purv Purohit
  • Patent number: 7632477
    Abstract: This invention relates to a process for preparing zirconium oxide, in its various forms, including zirconium-based mixed oxides. There is described a process for preparing a zirconium oxide in the absence of a cerium salt which comprises precipitating a zirconium hydroxide from an aqueous solution of a zirconium salt by reaction with an alkali in the presence of a controlled amount of sulphate anions at a temperature not greater than 50° C. and then calcining the hydroxide to form an oxide, wherein the oxide thus formed is essentially sulphate free. Catalysts and ceramics can be produced from the product oxides having improved thermal stability and improved sinterability, respectively. A particular use of the product oxide is as a promoter or catalyst support in automobile exhaust systems.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: December 15, 2009
    Assignee: Magnesium Elektron, Ltd.
    Inventors: Yasuhide Takao, Colin Norman, Gavin Edwards, Ian Chisem, Clare Jones
  • Patent number: 7431910
    Abstract: A process for preparing zirconium-cerium-based mixed oxides which comprises reacting an alkali with an aqueous solution of a zirconium salt containing 0.42-0.7 mole of sulphate anion (SO42?) per mole of zirconium cation at a temperature of not greater than 50° C., in the presence of a cerium salt to form a cerium-zirconium mixed hydroxide, and then calcining the cerium—zirconium mixed hydroxide to form a mixed oxide. The mixed oxides possess good thermal stability and are essentially single phase and are suitable as promoters and catalyst supports in, particularly, automobile exhaust systems.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: October 7, 2008
    Assignee: Magnesium Elektron Ltd.
    Inventors: Yasuhide Takao, Colin Norman, Gavin Edwards, Ian Chisem
  • Publication number: 20060120951
    Abstract: This invention relates to a process for preparing zirconium oxide, in its various forms, including zirconium-based mixed oxides. There is described a process for preparing a zirconium oxide in the absence of a cerium salt which comprises precipitating a zirconium hydroxide from an aqueous solution of a zirconium salt by reaction with an alkali in the presence of a controlled amount of sulphate anions at a temperature not greater than 50° C. and then calcining the hydroxide to form an oxide, wherein the oxide thus formed is essentially sulphate free. Catalysts and ceramics can be produced from the product oxides having improved thermal stability and improved sinterability, respectively. A particular use of the product oxide is as a promoter or catalyst support in automobile exhaust systems.
    Type: Application
    Filed: April 29, 2004
    Publication date: June 8, 2006
    Applicant: Magnesium Elektron Ltd.
    Inventors: Yasuhide Takao, Colin Norman, Gavin Edwards, Ian Chisem, Clare Jones
  • Publication number: 20060088463
    Abstract: A process for preparing zirconium-cerium-based mixed oxides which comprises reacting an alkali with an aqueous solution of a zirconium salt containing 0.42-0.7 mole of sulphate anion (SO42?) per mole of zirconium cation at a temperature of not greater than 50° C., in the presence of a cerium salt to form a cerium-zirconium mixed hydroxide, and then calcining the cerium-zirconium mixed hydroxide to form a mixed oxide. The mixed oxides possess good thermal stability and are essentially single phase and are suitable as promoters and catalyst supports in, particularly, automobile exhaust systems.
    Type: Application
    Filed: October 30, 2002
    Publication date: April 27, 2006
    Applicant: Magneslum Elektron Ltd.
    Inventors: Yasuhide Takao, Colin Norman, Gavin Edwards, Ian Chisem