Patents by Inventor John Scott Shaffer

John Scott Shaffer 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).

  • Perfluorinated organo substituted cyylosiloxanes and copolymers prepared from these cyclosiloxahes
    Patent number: 5914420
    Abstract: Compositions of unstrained perfluorinated organo substituted cyclosiloxanes of formula (I): ##STR1## wherein m is an integer of 1 to 12; n is an integer of 1 to 4; X is a divalent radical which may include O, NH, N(CH.sub.3), OC(O), NHC(O), N(CH.sub.3)C(O)CH.sub.2 ; and R.sup.F is a perfluorinated straight chain or branched chain monovalent alkyl radical of 1 to 25 carbon atoms; or R.sup.F is a perfluorinated ether radical of the general formula (II): ##STR2## wherein p is an integer of 1 to 10 are described, along with copolymer compositions prepared from these cyclopolysiloxanes and from mixtures of these cyclosiloxanes and other siloxanes.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: June 22, 1999
    Assignee: PCR, Inc.
    Inventors: Mark A. Buese, John Scott Shaffer
  • Perfluorinated ether organo substituted cyclosiloxanes and copolymers prepared from these cyclosiloxanes
    Patent number: 5892086
    Abstract: Compositions of unstrained perfluorinated ether organo substituted cyclosiloxanes of formula (I): ##STR1## wherein m is an integer of 1 to 12; n is an integer of 1 to 4; X is a divalent radical which may include O, NH, N(CH.sub.3), OC(O), NHC(O), N(CH.sub.3)C(O)CH.sub.2 ; and R.sup.F is a perfluorinated ether radical of the general formula (II): ##STR2## wherein p is an integer of 1 to 10 are described, along with copolymer compositions prepared from these cyclopolysiloxanes and from mixtures of these cyclosiloxanes and other siloxanes.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: April 6, 1999
    Assignee: PCR, Inc.
    Inventors: Mark A. Buese, John Scott Shaffer