Patents by Inventor Roseann M. Cyngier

Roseann M. Cyngier 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).

  • C-branched zwitterionic surfactants and enhanced oil recovery method using same
    Patent number: 4908141
    Abstract: A C-branched zwitterionic surfactant represented by the following formula is disclosed: ##STR1## wherein x and y are numbers, x is less than or equal to y+1, and the sum of x+y in the range of about 7 to about 19, with the provisos that: (1) when the sum of x+y is in the range of about 7 to about 13, x/y is in the range of about 0.3 to about 1.2; and (2) when the sum of x+y is in the range of about 14 to about 19, x/y is in the range of about 0.1 to about 0.7. An enhanced oil recovery method using the foregoing surfactants is also disclosed.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: March 13, 1990
    Assignee: The Standard Oil Company
    Inventors: Roman Loza, Roseann M. Cyngier
  • C-branched zwitterionic surfactants and enhanced oil recovery method using same
    Patent number: 4853138
    Abstract: A C-branched zwitterionic surfactant represented by the following formula is disclosed: ##STR1## wherein x and y are numbers, x is less than or equal to y+1, and the sum of x+y is in the range of about 7 to about 19, with the provisos that: (1) when the sum of x+y is in the range of about 7 to about 13, x/y is in the range of about 0.3 to about 1.2; and (2) when the sum of x+y is in the range of about 14 to about 19, x/y is in the range of about 0.1 to about 0.7. An enhanced oil recovery method using the foregoing surfactants is also disclosed.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: August 1, 1989
    Assignee: The Standard Oil Company
    Inventors: Roman Loza, Roseann M. Cyngier