Patents by Inventor Cheryl Lynn Casper

Cheryl Lynn Casper 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).

  • Fluorinated vinylidene cationic surfactant
    Patent number: 8168683
    Abstract: A fluorinated pyridinium cationic compound of formula (I) wherein, Rf is F(CF2)6(CH2CF2)m(CH2CH2)n—, m and n are each independently integers of 1 to 3, and R is H, C1 to C5 linear or branched alkyl, or C1 to C5 linear or branched alkoxy, having surfactant properties for lowering surface tension in an aqueous medium or solvent medium, and for use as a foaming agent.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: May 1, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Sheng Peng, Allison Mary Yake, Cheryl Lynn Casper
  • FLUORINATED VINYLIDENE CATIONIC SURFACTANT
    Publication number: 20110092395
    Abstract: A fluorinated pyridinium cationic compound of formula (I) wherein, Rf is F(CF2)6(CH2CF2)m(CH2CH2)n—, m and n are each independently integers of 1 to 3, and R is H, C1 to C5 linear or branched alkyl, or C1 to C5 linear or branched alkoxy, having surfactant properties for lowering surface tension in an aqueous medium or solvent medium, and for use as a foaming agent.
    Type: Application
    Filed: October 15, 2009
    Publication date: April 21, 2011
    Applicant: E. I. DUPONT DE NEMOURS AND COMPANY
    Inventors: Sheng Peng, Allison Mary Yake, Cheryl Lynn Casper
  • FLUORINATED CATIONIC SURFACTANT
    Publication number: 20110092394
    Abstract: A composition comprising a fluorinated pyridinium cationic compound of formula (I) wherein Rf is R1(CH2CH2)n—, R1 is a C7 to C20 perfluoroalkyl group interrupted by at least one catenary oxygen atom, each oxygen bonded to two carbon atoms, n is an integer of 1 to 3, and R is H, C1 to C5 linear or branched alkyl, or C1 to C5 linear or branched alkoxy, having surfactant properties for lowering surface tension in an aqueous medium or solvent medium, and for use as a foaming agent.
    Type: Application
    Filed: October 15, 2009
    Publication date: April 21, 2011
    Applicant: E. I. DUPONT DE NEMOURS AND COMPANY
    Inventors: Sheng Peng, Allison Mary Yake, Cheryl Lynn Casper
  • PREVENTION AND REMEDIATION OF WATER AND CONDENSATE BLOCKS IN WELLS
    Publication number: 20090281002
    Abstract: A method of removing and preventing water and condensate blocks in wells by contacting a subterranean formation with a composition comprising a low molecular weight fluorinated copolymer having perfluoro alkyl moieties which are no longer than C6.
    Type: Application
    Filed: May 8, 2009
    Publication date: November 12, 2009
    Applicant: E. I. du Pont de Nemours and Company
    Inventor: Cheryl Lynn Casper