Patents by Inventor Cheryl L. S. Elsbernd

Cheryl L. S. Elsbernd 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).

  • Method of making an electret
    Publication number: 20030054716
    Abstract: A method of making an electret that includes contacting a porous substrate that includes polymer with a composition that includes solvent capable of swelling the polymer, removing the solvent from the substrate, and contacting the substrate with water in a manner sufficient to impart an electret charge to the substrate.
    Type: Application
    Filed: September 7, 2001
    Publication date: March 20, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Shih-Hung Chou, Tien Tsung Wu, Betty Z. Mei, Mark S. Schaberg, Gina M. Buccellato, Cheryl L.S. Elsbernd, Miguel A. Guerra
  • Compositions comprising fluorinated silanes and compressed fluid CO2
    Publication number: 20020192380
    Abstract: The present invention provides composition for treating a substrate comprising a homogeneous mixture of:
    Type: Application
    Filed: April 19, 2001
    Publication date: December 19, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Cheryl L.S. Elsbernd, Michael S. Terrazas, Steven J. Martin, Mark J. Pellerite
  • Process for preparing poly(vinyl trifluoroacetate) and poly(vinyltrifluoroacetate/vinyl ester) copolymers in supercritical Co.sub .
    Patent number: 5559198
    Abstract: A method for the production of poly(vinyl trifluoroacetate) and copolymers thereof with vinyl esters is described. Poly(vinyl trifluoroacetate) (PVTFA) is obtained in relatively high yield under mild conditions by using carbon dioxide under supercritical conditions as a solvent. Synthesis of syndiotactic PVTFA on a commercial scale without the use of environmentally-harmful solvents is made possible by the invention, which provides a convenient route to syndiotactic polyvinyl alcohol.
    Type: Grant
    Filed: July 8, 1994
    Date of Patent: September 24, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gilbert L. Eian, Cheryl L. S. Elsbernd
  • Fluorine-containing acrylate and methacrylate side-chain liquid crystal monomers and polymers
    Patent number: 5087672
    Abstract: The present invention relates to novel fluorinated acrylate and methacrylate ester monomers and homopolymers and copolymers thereof. In another aspect, it relates to a process for preparing monomers of the invention. Homopolymers and copolymers of the invention have units which correspond to the following general chemical formula: ##STR1## wherein R is hydrogen, halo, a C.sub.1 to C.sub.4 alkyl or haloalkyl group, or a C.sub.6 to C.sub.10 aryl group,W is --O-- or --NR.sup.1 --, wherein R.sup.1 is hydrogen or a C.sub.1 to C.sub.4 alkyl group,X is a carbon-to-carbon single bond or a spacer group,Y is a mesogenic group, andZ is a fluorinated alkyl group.The novel monomers and polymers can be liquid crystals.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: February 11, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Stefan A. Babirad, Eugene P. Janulis, Nicholas A. Stacey, Cheryl L. S. Elsbernd