Patents by Inventor Francis J. Hartke

Francis J. Hartke 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).

  • Corrosion inhibition
    Patent number: 4212842
    Abstract: This invention relates to a process of inhibiting corrosion which comprises adding an aqueous soluble form of a normally insoluble corrosion inhibitor to an aqueous system which converts the soluble corrosion inhibitor to an insoluble form which coats the metal with a corrosion inhibiting film.For example, a water insoluble heterocyclic amine used as a water soluble salt is dissolved in an aqueous system having a pH in excess of about 6 where the heterocyclic amine itself, i.e., in non-salt form, comes out of solution as a stable, fine dispersion which coats the metal with a uniform and tenacious corrosion inhibiting film.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: July 15, 1980
    Assignee: Petrolite Corporation
    Inventor: Francis J. Hartke
  • Amine bisulfites
    Patent number: 3976593
    Abstract: This invention relates to the amine bisulfites which are useful as a combination corrosion inhibitor/oxygen scavenger. This is illustrated by heterocyclic amine bisulfites such as pyridine bisulfites.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: August 24, 1976
    Assignee: Petrolite Corporation
    Inventors: Francis J. Hartke, James E. Davis