Patents by Inventor Jan Hedkvist

Jan Hedkvist 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).

  • Method and plant for purification of oil-contaminated bilge and sludge water on a ship, and ship equipped with such plant
    Patent number: 8696873
    Abstract: The present invention relates to a method for purification of bilge and sludge water on a ship, especially at sea, using excess heat from the ship's engine(s) to a level of oil contamination of less than 15 ppm. The invention also relates to a plant for carrying out the method, and a vessel including such plant, as well as the use of the method and plant.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: April 15, 2014
    Assignee: PPM-Clean AB
    Inventors: Benny Karlström, Jan Hedkvist
  • METHOD AND PLANT FOR PURIFICATION OF OIL-CONTAMINATED BILGE AND SLUDGE WATER ON A SHIP, AND SHIP EQUIPPED WITH SUCH PLANT
    Publication number: 20120160660
    Abstract: The present invention relates to a method for purification of bilge and sludge water on a ship, especially at sea, using excess heat from the ship's engine(s) to a level of oil contamination of less than 15 ppm. The invention also relates to a plant for carrying out the method, and a vessel including such plant, as well as the use of the method and plant.
    Type: Application
    Filed: January 25, 2012
    Publication date: June 28, 2012
    Applicant: PPMCLEAN AB
    Inventors: Benny Karlström, Jan Hedkvist