Patents by Inventor Goran H. Freij

Goran H. Freij 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).

  • Process for the cleaning of articles or surfaces and a cleaner bath to be used in the process
    Patent number: 4906303
    Abstract: The invention relates to a process for the cleaning of articles or surfaces using a liquid cleaner of low viscosity containing N-methyl-2-pyrrolidone by immersion into a bath containing said cleaner. According to the invention the water content of the cleaner is kept at desired low values by means of a water absorption preventing layer applied on the surface of the cleaner and comprising at least one liquid, aliphatic hydrocarbon, which is immiscible with N-methyl-2-pyrrolidone and has a straight, branched or ring-closed carbon chain, or comprising microballoons or microspheres of a hydrophobic material which is insoluble in N-methyl-2-pyrrolidone.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: March 6, 1990
    Inventor: Goran H. Freij