Patents by Inventor Daniel L. Michalopoulos

Daniel L. Michalopoulos 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: 5736058
    Abstract: A method for inhibiting the microbial adhesion on surfaces in contact with an aqueous system is disclosed, which comprises adding to the system a treatment comprising an alkylsulfosuccinate surfactant.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: April 7, 1998
    Assignee: BetzDearborn Inc.
    Inventors: J. Barry Wright, Daniel L. Michalopoulos
  • Patent number: 5607597
    Abstract: A treatment for enhancing the activity of biocidal compounds to control the growth of microbes in an aqueous system is disclosed, which comprises adding to said compounds an effective amount of an alkylsulfosuccinate surfactant.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: March 4, 1997
    Assignee: BetzDearborn Inc.
    Inventors: J. Barry Wright, Daniel L. Michalopoulos
  • Patent number: 5593599
    Abstract: A method for inhibiting the microbial adhesion on surfaces in contact with an aqueous system is disclosed, which comprises adding to the system a treatment comprising an alkylsulfosuccinate surfactant.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: January 14, 1997
    Assignee: BetzDearborn Inc.
    Inventors: J. Barry Wright, Daniel L. Michalopoulos
  • Patent number: 5512186
    Abstract: A method for inhibiting the microbial adhesion on surfaces in contact with an aqueous system is disclosed, which comprises adding to the system a treatment comprising an alkylsulfosuccinate surfactant.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: April 30, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: J. Barry Wright, Daniel L. Michalopoulos
  • Patent number: 4997523
    Abstract: A composition and method for inhibiting the deposition of white pitch on the surfaces of papermaking equipment during the processing of recycled coated broke. The process involves adding to the coated broke during repulping a composition having a first compound of a tetrafunctional alkoxylated diamine having the structure: ##STR1## wherein R.sub.1 and R.sub.2 are ethylene oxide or propylene oxide and R.sub.1 and R.sub.2 are not the same, and a second compound selected from the group consisting of a phosphate, phosphonate and phosphonic acid.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: March 5, 1991
    Assignee: Betz PanerChem, Inc.
    Inventors: Jacqueline K. Pease, Catherine S. Dixon, Daniel L. Michalopoulos
  • Patent number: 4872995
    Abstract: Methods of controlling the formation of calcium oxalate in aqueous systems are disclosed. The methods comprise adding from about 0.1 to 500 ppm of a water soluble (meth)acrylic acid/allyl ether copolymer to the desired water system. The methods are especially well adapted for use in pulping and paper making systems wherein calcium oxalate is often encountered as a troublesome scale forming compound.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: October 10, 1989
    Assignee: Betz Laboratories, Inc.
    Inventors: Fu Chen, Daniel L. Michalopoulos
  • Patent number: 4861429
    Abstract: This invention relates to a process for inhibiting white pitch deposition in felts of a papermaking system including adding to the felts an effective inhibiting amount of an organic, anionic polyelectrolyte. The molecular weight of the polyelectrolyte is preferably from about 1,000 to 100,000. The polyelectrolyte is selected from the group consisting of polyacrylic acid, polmethacrylic acid, acrylic acid/polyethylene glycol allyl ether copolymers, methacrylic acid/polyethylene glycol allyl ether copolymers, acrylic acid/1-allyloxy-2-hydroxypropane sulfonic acid copolymers. The use of these polyelectrolytes in combination with surfactants provides an especially effective white pitch inhibiting and total felt conditioning process when applied to the felt.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: August 29, 1989
    Assignee: Betz Laboratories, Inc.
    Inventors: Daniel J. Barnett, Daniel L. Michalopoulos