Patents by Inventor Douglas Baumann

Douglas Baumann 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: 9205046
    Abstract: The present invention relates to a composite hydrogel comprising a blend of an aqueous solution of an anionic polysaccharide or a derivative thereof, such as hyaluronan (also commonly referred to as hyaluronic acid) or a derivative thereof and an aqueous solution of methylcellulose or another water soluble cellulose derivative thereof, having dispersed polymeric particles, such as polymeric hydrophobic particles therein selected from micro particles and nanoparticles, and wherein the stability of the hydrogel is enhanced relative to the stability of the hydrogel alone. The polymeric particles may contain at least one therapeutic agent, in which case each therapeutic agent exhibits a linear sustained release rate that can be tuned or altered by selecting the appropriate polymer formulation of the micro particles and/or nanoparticles.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: December 8, 2015
    Assignee: The Governing Council of the University of Toronto
    Inventors: Molly S. Shoichet, M. Douglas Baumann, Catherine Elizabeth Kang
  • Publication number: 20100285113
    Abstract: The present invention relates to a composite hydrogel comprising a blend of an aqueous solution of an anionic polysaccharide or a derivative thereof, such as hyaluronan (also commonly referred to as hyaluronic acid) or a derivative thereof and an aqueous solution of methylcellulose or another water soluble cellulose derivative thereof, having dispersed polymeric particles, such as polymeric hydrophobic particles therein selected from micro particles and nanoparticles, and wherein the stability of the hydrogel is enhanced relative to the stability of the hydrogel alone. The polymeric particles may contain at least one therapeutic agent, in which case each therapeutic agent exhibits a linear sustained release rate that can be tuned or altered by selecting the appropriate polymer formulation of the micro particles and/or nanoparticles.
    Type: Application
    Filed: May 12, 2010
    Publication date: November 11, 2010
    Inventors: Molly S. Shoichet, M. Douglas Baumann, Catherine Elizabeth Kang
  • Patent number: 7638636
    Abstract: Novel phosphonium and imidazolium salts and methods for preparing them are disclosed. The novel phosphonium and imidazolium compounds are useful as polar solvents and have the general formula (I): Q+X? wherein Q+ is formula (a) or formula (b); and X? is formula (c), formula (d) or formula (e); and wherein: each of R1, R2, R3, R4, R5, R9, R10, R11, R12, and R13 is independently a hydrocarbyl group; each of R6, R7, and R8 is independently a hydrogen or hydrocarbyl group.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: December 29, 2009
    Assignee: Cytec Technology Corp.
    Inventors: Yuehui Zhou, Allan J. Robertson, John H. Hillhouse, Douglas Baumann
  • Publication number: 20060264645
    Abstract: Novel phosphonium and imidazolium salts and methods for preparing them are disclosed. The novel phosphonium and imidazolium compounds are useful as polar solvents and have the general formula (I): Q+X? wherein Q+ is formula (a) or formula (b); and X? is formula (c), formula (d) or formula (e); and wherein: each of R1, R2, R3, R4, R5, R9, R10, R11, R12, and R13 is independently a hydrocarbyl group; each of R6, R7, and R8 is independently a hydrogen or hydrocarbyl group.
    Type: Application
    Filed: August 8, 2003
    Publication date: November 23, 2006
    Inventors: Yuehui Zhou, Allan Robertson, John Hillhouse, Douglas Baumann
  • Patent number: 5839184
    Abstract: A method is described for creating an inductor in the package for an integrated circuit. The inductor is formed by utilizing one or more of the bond leads as the core of the inductor and by winding a series of coils about the core in connection either with the bond pads of the integrated circuit itself or to other bond leads for connection outside the integrated circuit chip.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: November 24, 1998
    Assignee: VLSI Technology, Inc.
    Inventors: Peter Chi-Ming Ho, D. Douglas Baumann, Sang S. Lee
  • Patent number: 5754070
    Abstract: A metastableproof flip-flop receives an input value on a flip-flop input. The flip-flop holds an output value on a flip-flop output. In response to a transition of a clock signal, a transition in the output value occurs. The new output value is the input value formerly received by the flip-flop. In order to make the flip-flop metastableproof, the transition in the output value is delayed when the input value is in a metastable state. When the input value is no longer in the metastable state, then the transition in the output value is allowed to complete.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: May 19, 1998
    Assignee: VLSI Technology, Inc.
    Inventors: D. Douglas Baumann, Madhusudan K. Chokshi