Patents by Inventor John A. Herce

John A. Herce 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).

  • Crystal modified deposition of hydrated metal oxide
    Patent number: 3997452
    Abstract: A treating liquid for depositing a coating of hydrated metal oxide on a remotely located material (such as a subterranean sand mass to be consolidated) is improved by a crystal modifier. The improved treating liquid comprises an aqueous alkaline solution of an amphoteric metal compound, a pH-reducing reactant, and a hydroxyorganic crystal modifier.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: December 14, 1976
    Assignee: Shell Oil Company
    Inventors: Edwin A. Richardson, John A. Herce
  • Method for continuously separating emulsions
    Patent number: 3996157
    Abstract: Method and apparatus for continuously separating disperse phase and continuous phase from a liquid-liquid emulsion. In one embodiment, oil-water emulsion is flowed into a contacting zone in which the emulsion is agitated with a fibrous, solid material such as shredded newspaper. Water having an oil content of less than 10 parts per million is continuously withdrawn near the bottom of the contacting zone and oil is continuously withdrawn near the top of the contacting zone.
    Type: Grant
    Filed: July 18, 1974
    Date of Patent: December 7, 1976
    Assignee: Shell Oil Company
    Inventors: John A. Herce, James E. Heath