Patents by Inventor Martha K. Johansson

Martha K. Johansson 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).

  • Cellulase, sodium bicarbonate and citric acid cleaning solution and methods of use
    Patent number: 5443656
    Abstract: A composition and process for the degradation of fibrous materials is provided. More particularly, a composition comprising cellulase, sodium bicarbonate and citric acid, wherein the combination of sodium bicarbonate and citric acid unexpectedly increases the cellulase activity and thus improves the breakdown of toilet tissue in waste holding tanks, is set forth. The composition of the present invention may also include other additives known to those skilled in the art.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: August 22, 1995
    Assignee: Thetford Coporation
    Inventors: Mary R. Burrows, Martha K. Johansson