Patents by Inventor Jan Hamrefors

Jan Hamrefors 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).

  • Carbon Dioxide Cleaning Method
    Publication number: 20080223406
    Abstract: A method for cleaning objects is disclosed. The method includes placing the objects into a cleaning chamber and contacting them with a dense phase gas. After draining the dense phase gas from the cleaning chamber, the pressure in the cleaning chamber is changed at a rate of at least 1 bar per minute, preferably at a rate of 5 bar per minute, more preferably at a rate of 10 bar per minute.
    Type: Application
    Filed: July 12, 2005
    Publication date: September 18, 2008
    Applicant: Linde Aktiengesellschaft
    Inventors: Kenneth Lindqvist, Anders Marcusson, Joachim Karthaeuser, Jan Hamrefors
  • Cleaning with liquid carbon dioxide
    Publication number: 20060289039
    Abstract: The invention relates to a method for cleaning objects in a cleaning vessel using liquid carbon dioxide, wherein the cleaning vessel is at least partly filled with liquid carbon dioxide. Prior to and/or during the cleaning operation the pressure within said cleaning vessel is raised to a value above the corresponding vapour pressure. A gas other than carbon dioxide is introduced into said cleaning vessel and at least a portion of the cleaning operation is performed after the introduction of said gas.
    Type: Application
    Filed: January 15, 2004
    Publication date: December 28, 2006
    Applicant: LINDE AG ZENTRALE PATENTABTEILUNG
    Inventors: Jan Hamrefors, Kenneth Lindqvist