Patents by Inventor Peter E. Laks

Peter E. Laks 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 treating wood against fungal attack
    Patent number: 4988545
    Abstract: Complexes of sulfited tannin extract and a copper(II) ion effectively protect wood against fungal attack. The complex can be impregnated into wood in a single step treatment using a water/organic solvent system, or formed in situ by treating the wood with an aqueous solution containing the extract and subsequently treating the wood with an aqueous solution containing a copper (II) salt.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: January 29, 1991
    Assignee: Board of Control of Michigan Technological University
    Inventor: Peter E. Laks
  • Biocidal treatment of materials with catechins
    Patent number: 4906656
    Abstract: Sulfide derivatives of catechins derived from condensed tannins have broad spectrum biocidal characteristics. Epicatechin-4-alkylsulfides and cupric complexes thereof containing up to 20, preferably 5 to 15, carbon atoms are particularly effective biocides against wood rotting fungi and gram-positive bacteria.Such sulfides are prepared by reacting condensed tannin, either in the form of a purified tannin extract or comminuted plant tissue, with an appropriate thiol under mild acidic conditions.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: March 6, 1990
    Assignee: Board of Control of Michigan Technological University
    Inventor: Peter E. Laks
  • Biocidal derivatives of catechins
    Patent number: 4760088
    Abstract: Sulfide derivatives of catechins derived from condensed tannins have broad spectrum biocidal characteristics. Epicatechin-4-alkylsulfides and cupric complexes thereof containing up to 20, preferably 5 to 15, carbon atoms are particularly effective biocides against wood rotting fungi and gram-positive bacteria.Such sulfides are prepared by reacting condensed tannin, either in the form of a purified tannin extract or comminuted plant tissue, with an appropriate thiol under mild acidic conditions.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: July 26, 1988
    Assignee: Board of Control of Michigan Technological University
    Inventor: Peter E. Laks