Patents by Inventor William Farnham

William Farnham 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).

  • Publication number: 20080039651
    Abstract: This invention provides an efficient method for synthesizing trithiocarbonate RAFT agents, RSC(S)SR?, that can be used in the living polymerization of methacrylates and other olefinic monomers. This invention also provides an efficient method of synthesizing bis(alkylsulfanylthiocarbonyl) disulfides that are useful as intermediates in the synthesis of trithiocarbonate RAFT agents.
    Type: Application
    Filed: May 11, 2005
    Publication date: February 14, 2008
    Inventor: William Farnham
  • Publication number: 20070225447
    Abstract: This invention provides a method for removing certain sulfur-containing groups from polymers, especially those made via RAFT polymerization processes.
    Type: Application
    Filed: May 11, 2005
    Publication date: September 27, 2007
    Inventors: William Farnham, Graeme Moad, San Hoa Thang, Ezio Rizzardo, Michael Fryd
  • Publication number: 20070123729
    Abstract: This invention provides an efficient method for synthesizing trithiocarbonates, RSC(S)SR? that can be used, for example, as RAFT agents in the living polymerization of styrenics, acrylates, and other olefinic monomers.
    Type: Application
    Filed: November 29, 2005
    Publication date: May 31, 2007
    Inventor: William Farnham
  • Publication number: 20060166129
    Abstract: This invention provides a fluorine-containing copolymer having a repeat unit derived from at least one fluorinated olefin and a repeat unit derived from at least one polycyclic ethylenically unsaturated monomer having pendant hydroxyl or esterified hydroxyl groups, and optionally other repeat units, typically derived from an acrylate. These polymers have high transparency at short wavelengths such as 193 nm and 157 nm, and provide good plasma etch resistance and adhesive properties. Also provided are photoresist compositions and substrates coated therewith.
    Type: Application
    Filed: August 19, 2003
    Publication date: July 27, 2006
    Inventors: Andrew Feiring, Frank Schadt III, William Farnham, Jerald Feldman
  • Publication number: 20060167284
    Abstract: The present invention provides novel fluorine-containing copolymers which comprise at least one fluorinated olefin, at least one polycyclic ethylenically unsaturated monomer with a fused 4-membered heterocyclic ring and, optionally, other components. The copolymers are useful for photoimaging compositions and, in particular, photoresist compositions (positive-working and/or negative-working) for imaging in the production of semiconductor devices. The copolymers are especially useful in photoresist compositions having high UV transparency (particularly at short wavelengths, e.g., 157 nm) which are useful as base resins in resists and potentially in many other applications.
    Type: Application
    Filed: August 8, 2003
    Publication date: July 27, 2006
    Inventors: Andrew Feiring, Frank Schadt III, Viacheslav Petrov, Bruce Smart, William Farnham
  • Publication number: 20050277052
    Abstract: This invention provides novel fluorine containing polymers which comprise at least one fluorinated olefin, at least one polycyclic ethylenically unsaturated monomer with a fused 4-membered carbocyclic ring and, optionally, other components. The polymers are useful for photoimaging compositions and, in particular, photoresist compositions (positive-working and/or negative-working) for imaging in the production of semiconductor devices. The polymers are especially useful in photoresist compositions having high UV transparency (particularly at short wavelengths, e.g., 157 nm) which are useful as base resins in resists and potentially in many other applications.
    Type: Application
    Filed: August 8, 2003
    Publication date: December 15, 2005
    Inventors: Andrew Feiring, Frank Schadt, III, Viacheslav Petrov, Bruce Smart, William Farnham
  • Publication number: 20050239984
    Abstract: The invention provides a polymer having (a) at least one repeat unit derived from an ethylenically unsaturated compound having at least one fluorine atom covalently attached to an ethylenically unsaturated carbon atom; and (b) at least one repeat unit derived from an ethylenically unsaturated cyclic compound of structure: (I) wherein n is 0, 1, or 2; and R2 to R4 are independently H; C1-C10 alkyl or alkoxy, optionally substituted by halogen or ether oxygens; or C6-C20 aryl. These polymers can be used in making photoresist compositions and coated substrates.
    Type: Application
    Filed: August 8, 2003
    Publication date: October 27, 2005
    Inventors: Andrew Feiring, Frank Schadt, Viacheslav Petrov, Bruce Smart, William Farnham
  • Publication number: 20050153014
    Abstract: The invention is directed to creamy alcoholic beverages comprising wine and/or spirits and creamer, wherein the creamer is emulsified within the wine and/or spirit and the creamy alcoholic beverage is storage stable at a temperature of about 20° C. to about 25° C. for at least one year. Optionally, the creamy alcoholic beverage may include pectin and does not excessively foam. The wine may be treated to substantially remove or deactivate proteolytic enzymes within the wine using at least one of heat treatment, column adsorption, clay adsorption, tangential filtration, or ultra-filtration.
    Type: Application
    Filed: January 9, 2004
    Publication date: July 14, 2005
    Inventors: William Farnham, Marilyn Konopka, Anil Shrikhande
  • Publication number: 20050119378
    Abstract: The invention pertains to low polydispersity acrylic polymers useful for photoimaging and photoresist compositions, and to the photoimaging processes which use these compositions. The low polydispersity polymers of this invention are prepared using controlled radical polymerization (CRP) techniques, such as RAFT (reversible addition fragmentation chain transfer) polymerization.
    Type: Application
    Filed: September 16, 2004
    Publication date: June 2, 2005
    Inventors: William Farnham, Michael Fryd, Frank Schadt