Patents by Inventor Roald K. Berg

Roald K. Berg 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).

  • Water-based defoamer compositions
    Patent number: 4032473
    Abstract: Water-based defoamer compositions in the form of aqueous emulsions containing, as the disperse phase, about 25-55% of a water insoluble liquid hydrocarbon, about 25-55% of a normally solid fatty acid diamide, about 1.0-7.5% of hydrophobic silica particles, and about 8-16% of a non-ionic emulsifier having an HLB of about 8-12, the percentages being based on the weight of the disperse phase. Optionally, up to about 10% of the diamide may be replaced with a silicone oil. The compositions are useful for controlling foam in pulp and paper mill operations.
    Type: Grant
    Filed: June 4, 1975
    Date of Patent: June 28, 1977
    Assignee: Associated Chemists, Inc.
    Inventors: Roald K. Berg, Douglas S. Smalley