Patents by Inventor Charles L. Strickler

Charles L. Strickler 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: 7592064
    Abstract: Carpet protectants comprising an aqueous dispersion comprising A. a partially fluorinated urethane polymer having at least one urea linkage, which compound is the product of the reaction of: (1) at least one organic polyisocyanate containing at least three isocyanate groups; (2) at least one fluorochemical compound which contains per molecule (a) a single functional group having one or more Zerewitinoff hydrogen atoms and (b) at least two carbon atoms, each of which is attached to at least two fluorine atoms; and (3) water in an amount sufficient to react with from about 5% to about 60% of the isocyanate groups in said polyisocyanate; B. a non-fluorinated cationic surfactant; and C. a non-fluorinated nonionic surfactant are disclosed.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: September 22, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Patrick Henry Fitzgerald, Andrew Hen Liu, Peter Michael Murphy, Charles L. Strickler
  • Patent number: 6790905
    Abstract: Carpet protectants comprising an aqueous dispersion comprising A. a partially fluorinated urethane polymer having at least one urea linkage, which compound is the product of the reaction of: (1) at least one organic polyisocyanate containing at least three isocyanate groups; (2) at least one fluorochemical compound which contains per molecule (a) a single functional group having one or more Zerewitinoff hydrogen atoms and (b) at least two carbon atoms, each of which is attached to at least two fluorine atoms; and (3) water in an amount sufficient to react with from about 5% to about 60% of the isocyanate groups in said polyisocyanate; B. a non-fluorinated cationic surfactant; and C. a non-fluorinated nonionic surfactant are disclosed.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: September 14, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Patrick Henry Fitzgerald, Andrew Hen Liu, Peter Michael Murphy, Charles L. Strickler
  • Publication number: 20030157296
    Abstract: Carpet protectants comprising an aqueous dispersion comprising
    Type: Application
    Filed: October 9, 2001
    Publication date: August 21, 2003
    Inventors: Patrick Henry Fitzgerald, Andrew Hen Liu, Peter Michael Murphy, Charles L. Strickler
  • Patent number: 4279960
    Abstract: Yellowing resistant, durable antistatic soil release agent: ##STR1## wherein X is resin moiety having amino nitrogens and 4 to 6 methylenes, each methylene being attached to amino nitrogen;Y.sub.1 is O(C.sub.2 H.sub.4 O).sub.5-20 R.sub.1 ; R.sub.1 is C.sub.1-5 alkyl;Y.sub.2 is O(C.sub.2 H.sub.4 O).sub.5-88 R.sub.2 ; R.sub.2 is C.sub.6-20 alkyl; ##STR2## R.sub.3 is C.sub.4-20 alkyl, C.sub.4-20 alkenyl or benzyl; R.sub.4 is C.sub.1-4 alkyl, A.crclbar. is anion, each of m and n is at least 1 and their sum is 12 to 100;each of a and b is 0 to 2 and their sum is 0 to 2;c is 1 to 2;a plus b plus c is 1 to 4;said agent having HLB of 14.5 to 18.0, Brookfield viscosity (20 weight % aqueous solution viscosity at 20.degree. C.) of 0.250 to 16.000 pascal seconds, electrical resistivity (Keithley Log R) on polyester fabric (20.+-.2% RH, 23.+-.1.degree. C.) less than 13.00 initially and 14.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: July 21, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kenneth C. Smeltz, Charles L. Strickler