Patents by Inventor Stephen Zushma

Stephen Zushma 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).

  • Two tail-two head and two tail-one head surfactants
    Patent number: 5585516
    Abstract: The present invention relates to novel two tail-two head and two tail-one head surfactants. In one embodiment, the present invention comprises a novel composition of matter having the general formula: ##STR1## wherein R1 and R2 may be the same or different and are selected from liner or branched hydrocarbon chains with carbon numbers 8 and 22;R3 is H, SO.sup.-.sub.y M.sup.+, or --O (CH2CH2O).sub.n X;R4 is SO.sup.-.sub.y M.sup.+, or --O (CH2CH2O).sub.n X;M is H, Li, Na, K, Rb or Cs;n is an integer from 2 to 50;y is 3 or 4; and,X is H or SO.sup.-.sub.y M.sup.-.Preferably, in the above composition when R3 is other than H, R3.dbd.R4.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: December 17, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Ramesh Varadaraj, Stephen Zushma
  • Diphenyl dialkyl methane surfactants
    Patent number: 5493050
    Abstract: In one embodiment, the present invention relates to novel two tail--two head and two tail--one head surfactants. In one embodiment, the present invention comprises a novel composition of matter having the general formula: ##STR1## wherein R1 and R2 may be the same or different and are selected from linear or branched hydrocarbon chains with from 6 to 22 carbon atoms;R3 is H, SO.sup.13.sub.y M.sup.+, or --O(CH2CH2O).sub.n X;R4 is SO.sup.--.sub.y M.sup.+, or --O(CH2CH2O).sub.n X;M is H, Li, Na, K, Rb or Cs;n is an integer from 2 to 50;y is 3 or 4; and,X is H or SO.sup.13.sub.y M.sup.+.Preferably, in the above composition when R3 is other than H, R3=R4.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: February 20, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Ramesh Varadaraj, Stephen Zushma
  • Two-cycle oil additive
    Patent number: 5393441
    Abstract: Briefly stated, the present invention comprises novel compounds useful as two-cycle oil additives obtained by reacting an alkyl acrylamide with a compound selected from the group consisting of polyalkylenepolyamines, polyalkylenepolyamines functionalized with polyalkyl acid anhydrides and polyalkylenepolyamines and a polyalkyl acid anhydride.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: February 28, 1995
    Assignee: Exxon Research and Engineering Company
    Inventors: Warren A. Thaler, Stephen Zushma, Richard H. Schlosberg