Patents by Inventor Stefan Klofver

Stefan Klofver 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: 5277764
    Abstract: Cellulose fibre containing products in sheet or web form, such as paper and pulp sheets, are produced from a suspension of cellulose containing fibres, and optional fillers, to which is added anionic inorganic particles, such as bentonite and silica based particles, and a cationic carbohydrate polymer containing aluminum. The cationic carbohydrate polymers are cationic galactomannans or cationic starch. High cationized starch with a degree of substitution of at least 0.07 are especially suitable.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: January 11, 1994
    Assignee: Eka Nobel AB
    Inventors: Kjell Johansson, Hans E. Johansson, Stefan Klofver