Patents by Inventor Reijo O. Seppanen

Reijo O. Seppanen 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 for the extraction of a substance from an aqueous solution
    Patent number: 4883595
    Abstract: The invention relates to a method for separating a substance from an aqueous solution and/or for concentrating it by using an organic extractant. In the method the substance to be separated is caused to pass from the aqueous solution to the extractant, whereafter this extractant is evaporated in direct contact with the aqueous phase into which it is desired to cause the substance to be extracted to pass.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: November 28, 1989
    Assignee: Oy Nokia AB
    Inventor: Reijo O. Seppanen