Patents by Inventor David A. Halsrud

David A. Halsrud 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: 5559087
    Abstract: A method of lubricating plastic conveyor tracks or belts is herein described wherein the lubricant composition contains a block copolymer of ethylene oxide and propylene oxide; also described are methods of manufacture of such lubricant compositions in both concentrate and diluted form. The compositions may also comprise an anionic and a nonionic surfactant as well as a neutralizing agent.
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: September 24, 1996
    Assignee: Ecolab Inc.
    Inventors: David A. Halsrud, Timothy A. Gutzmann
  • Patent number: 5158766
    Abstract: A single-part aqueous, storage stable, antimicrobial film-forming composition comprising a major portion of water, an antimicrobially effective amount of a cationic germicidal agent having the structure (R) (R.sub.1) (R.sub.2) (R.sub.3) N.sup.+ X.sup.-, wherein R, R.sub.1, R.sub.2, and R.sub.3 are independently selected from groups including benzyl, alkyl, benzyl, halo benzyl, C.sub.1-14 alkyl, C.sub.5-24 alkyl or C.sub.1-4 hydroxyalkyl and X.sup.- represents an anion capable of imparting water solubility or dispersability to the compound, and a stoichemetrically effective amount of acid functional anionic polymer, wherein said cationic germicidal agent and anionic polymer remain dissolved as a homogeneous aqueous solution until used.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: October 27, 1992
    Assignee: Ecolab, Inc.
    Inventors: Richard B. Greenwald, David A. Halsrud