Patents by Inventor Rosalie B. Hart

Rosalie B. Hart 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).

  • Methods and compositions for inhibitoring polymerization of vinyl monomers
    Patent number: 5221498
    Abstract: Methods and compositions are provided for inhibiting the polymerization of a vinyl monomer during elevated processing thereof or during storage or shipment of the monomer containing product. The compositions comprise a combination of a dihydroxybenzene compound and an organic amine compound.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: June 22, 1993
    Assignee: Betz Laboratories, Inc.
    Inventors: Dwight K. Reid, Rosalie B. Hart
  • Methods of extracting iron species from liquid hydrocarbons
    Patent number: 5078858
    Abstract: Methods of extracting iron species, such as iron naphthenate, and iron sulfides, from a liquid hydrocarbon, such as crude oil are disclosed. A chelant selected from oxalic or citric acid is added directly to the liquid hydrocarbon and mixed therewith. Then, wash water is added to form a water in oil emulsion. The emulsion is resolved, with iron laden aqueous phase being separated.
    Type: Grant
    Filed: August 1, 1990
    Date of Patent: January 7, 1992
    Assignee: Betz Laboratories, Inc.
    Inventors: Rosalie B. Hart, Paul V. Roling