Patents by Inventor Frederik Jan Schepers

Frederik Jan Schepers 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).

  • Floor treating method and machine
    Patent number: 6440225
    Abstract: A method is provided for stripping a polymer film from a floor surface, comprising the steps of: (a) applying a concentrated alkaline stripper solution including an alkaline agent and a solvent, to the polymer film; (b) allowing this concentrated alkaline solution to chemically act on the polymer film during a contact time of at least 5 seconds; (c) scrubbing the polymer film with a scrubbing device while diluting the concentrated alkaline solution with water, so as to obtain a sludge; (d) vacuum cleaning the floor surface by suction of the sludge, whereby this method is carried out using one floor treating machine. This method is an integrated floor stripping procedure which is considerably more effective than known stripping methods of the prior art.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: August 27, 2002
    Assignee: Diversey Lever, Inc.
    Inventors: Michael Van Den Burg, Josef Jans, Frederik Jan Schepers, Rolf Semmler, Pieter Van Der Vlist
  • Detergent composition and method for warewashing
    Patent number: 6368420
    Abstract: A chemical cleaning system for a multi-tank or a single-tank mechanical warewashing machine is provided, having at least two separate components for aqueous dissolution or dilution to respective use concentrations, a first component comprising an enzyme or a mixture of an enzyme and a cleaning agent, and a second component comprising a bleach, wherein the first component is introduced into a wash zone or step and wherein the second component is introduced into a post-rinse zone or step.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: April 9, 2002
    Assignee: Diversey Lever, Inc.
    Inventors: Petrus Adrianus Angevaare, Paul Flu, John Richard Nicholson, Frederik Jan Schepers
  • Detergent composition and laundry washing method
    Patent number: 6277153
    Abstract: A chemical cleaning system for a multi-tank or a single-tank laundry washing machine, having at least two separate components for aqueousdissolution or dilution to respective use concentrations, a first component comprising a proteolytic enzyme, and a second component comprising an imidoperoxycarboxylic acid, particularly phthaloylaminoperoxycaprbic acid (PAP), wherein the first component is introduced into a prewash zone or step, and the second component is introduced into a main wash zone or step. When using this system, it was found that effective cleaning could be obtained even at relatively low main wash temperatures of 45-55° C. As a result, much less energy was needed and a considerable reduction of textile damage was observed as compared with cleaning systems of the prior art.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: August 21, 2001
    Assignee: Diversey Lever, Inc.
    Inventors: Eddy Petrus Van Kouwen, Frederik Jan Schepers, Rudolf Comelis Verheul, Wilhelm Ewald Smit
  • Liquid detergent compositions
    Patent number: 5672580
    Abstract: An aqueous liquid detergent composition comprising a primary alkyl sulphate material, which is present in a non-solid dispersed phase.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: September 30, 1997
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Cornelis Bernard Donker, David Machin, Frederik Jan Schepers