Patents by Inventor Dejana Drew

Dejana Drew 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).

  • Process for preparing urethane-containing (meth)acrylic esters
    Patent number: 8399225
    Abstract: The invention relates to a process for preparing urethane-containing acrylic- and (meth)acrylic esters by reacting a urethane-containing alcohol with a reactant acrylic- or (meth)acrylic ester of a saturated alcohol in the presence of at least one polymerization inhibitor and an enzyme as a catalyst within a reactor, wherein the saturated alcohol released in the process and optionally an entraining agent form an azeotrope with an excess of the reactant (meth)acrylic ester, such that the azeotrope is removed by distillation under reduced pressure and at least one substream from the bottom of the reactor is circulated through the top of the distillation column. Using this process, urethane-containing acrylic- and (meth)acrylic esters are prepared in high yields and high purities under mild conditions from economically obtainable reactants with no significant polymer formation.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: March 19, 2013
    Assignee: BASF SE
    Inventors: Rainer Stürmer, Dejana Drew, Bernhard Hauer, Jürgen Däuwel, Uwe Meisenburg
  • BIOCATALYST FOR CATALYTIC HYDROAMINATION
    Publication number: 20120123155
    Abstract: The present invention relates to a method for the enzymatic hydroamination of C—C double bonds catalyzed by enzymes structurally and/or functionally related to phenylalanine ammonia lyase (PAL) isolated from microorganisms of Petroselinum crispum, Rhodoturula glutinis and/or functional active derivatives thereof.
    Type: Application
    Filed: July 27, 2010
    Publication date: May 17, 2012
    Applicant: BASF SE
    Inventors: Bernhard Hauer, Nina Schneider, Dejana Drew, Klaus Ditrich, Nick Turner, Bettina M. Nestl
  • Method for the production of optically-active alcohols
    Patent number: 8012725
    Abstract: The present invention relates to enzymic processes for preparing S-butan-2-ol; and to enzymes for carrying out said processes; to nucleic acid sequences coding for said enzymes, to expression cassettes, vectors and recombinant hosts containing said nucleic acid sequences.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: September 6, 2011
    Assignee: BASF SE
    Inventors: Rainer Stürmer, Bernhard Hauer, Dejana Drew, Michael Breuer, Hartwig Schröder
  • PROCESS FOR PREPARING URETHANE-CONTAINING (METH)ACRYLIC ESTERS
    Publication number: 20100291640
    Abstract: A process for preparing urethane-containing (meth)acrylic esters (U) by reacting a urethane-containing alcohol (A) with a (meth)acrylic ester of a saturated alcohol (G) in the presence of at least one polymerization inhibitor (P) with an enzyme (E) as a catalyst in a reactor, wherein a) the saturated alcohol released and any entraining agent used form an azeotrope with the excess corresponding (meth)acrylic ester (G), the azeotrope is removed by distillation under reduced pressure and b) at least a substream from the bottom of the reactor is circulated via the top of the distillation column.
    Type: Application
    Filed: May 10, 2010
    Publication date: November 18, 2010
    Applicant: BASF SE
    Inventors: Rainer Stuermer, Dejana Drew, Bernhard Hauer, Juergen Daeuwel, Uwe Meisenburg
  • Method for the Production of Optically-Active Alcohols
    Publication number: 20080009046
    Abstract: The present invention relates to enzymic processes for preparing S-butan-2-ol; and to enzymes for carrying out said processes; to nucleic acid sequences coding for said enzymes, to expression cassettes, vectors and recombinant hosts containing said nucleic acid sequences.
    Type: Application
    Filed: November 15, 2005
    Publication date: January 10, 2008
    Applicant: Basf Aktiengesellschaft
    Inventors: Rainer Sturmer, Bernhard Hauer, Dejana Drew, Michael Breuer, Hartwig Schroder