Patents by Inventor Chris F. Lehn

Chris F. Lehn 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).

  • Chemical solution dispenser apparatus and method of using
    Patent number: 4964185
    Abstract: An automatic dispenser for dispensing solid chemicals used in cleaning processes which includes (i) means for initiating dispensing of a concentrated chemical solution, (ii) means for forming a concentrated chemical solution, (iii) means for directing the concentrated chemical solution to its utilization point, (iv) means for measuring the conductivity and temperature of the concentrated chemical solution dispensed, (v) means for calculating the amount of chemical dispensed based upon the conductivity and temperature of the concentrated chemical solution dispensed, and (vi) means for terminating formation of the concentrated chemical solution when a predetermined amount of chemical has been dispensed.
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: October 23, 1990
    Assignee: Ecolab Inc.
    Inventor: Chris F. Lehn
  • Chemical solution dispenser apparatus and method of using
    Patent number: 4858449
    Abstract: An automatic dispenser for dispensing solid chemicals used in cleaning processes which includes (i) means for initiating dispensing of a concentrated chemical solution, (ii) means for forming a concentrated chemical solution, (iii) means for directing the concentrated chemical solution to its utilization point, (iv) means for measuring the conductivity and temperature of the concentrated chemical solution dispensed, (v) means for calculating the amount of chemical dispensed based upon the conductivity and temperature of the concentrated chemical solution dispensed, and (vi) means for terminating formation of the concentrated chemical solution when a predetermined amount of chemical has been dispensed.
    Type: Grant
    Filed: January 9, 1986
    Date of Patent: August 22, 1989
    Assignee: Ecolab Inc.
    Inventor: Chris F. Lehn