Patents by Inventor Elizabeth A. Bivins

Elizabeth A. Bivins 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: 6511546
    Abstract: A process for the use of an aqueous cleaning composition to remove organic material from a substrate. The cleaning composition preferably includes a nonionic surfactant and may also include a glycol ether solvent.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: January 28, 2003
    Assignee: Petroferm Inc.
    Inventors: Elizabeth A. Bivins, Nelson E. Prieto, Michael E. Hayes, Byron A. Starkweather
  • Patent number: 5705472
    Abstract: An aqueous cleaning composition having a pH of about 6 to about 8 and comprising a solution of the following ingredients: water, an organic solvent and an imidazoline-based cationic surfactant, each present in an amount effective to dissolve adherent soils from a substrate; and a nonionic surfactant in an amount sufficient to maintain said cationic surfactant in solution; and also a weak organic acid in an amount sufficient to impart to the composition said pH; wherein said composition is substantially free of any material which has an ozone-depletion factor of greater than about 0.15 and wherein said composition is substantially free of any material which would tend to form a solid with any of the ingredients comprising the composition, and its use to clean metallic and non-metallic surfaces.
    Type: Grant
    Filed: July 18, 1995
    Date of Patent: January 6, 1998
    Assignee: Petroferm Inc.
    Inventors: Michael E. Hayes, Elizabeth A. Bivins, Jacquelyn B. Coleman