Patents by Inventor Jeffrey M. Tennant

Jeffrey M. Tennant 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).

  • Polycarbonate compositions having reduced tendency to splay
    Patent number: 6046301
    Abstract: A transparent thermoplastic molding composition having good release properties is disclosed. The composition which contains no magnetic elements contains a polycarbonate resin and 0.01 to 0.3 percent by weight of a mold release agent. The agent is the product of a reaction of a compound represented by formula (I) ##STR1## where R.sub.1 denotes a C.sub.1-30 -alkyl group, with at least one member selected from the group consisting of ##STR2## where R.sub.2 and R.sub.3 independently denote C.sub.1-30 - alkyl or an aryl group, and ##STR3## where n is 1-7.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: April 4, 2000
    Assignees: Bayer Corporation, Bayer Aktiengesellschaft
    Inventors: Daniel H. Bolton, Sivaram Krishnan, Jon M. Newcome, Jeffrey M. Tennant, David M. Derikart, Ramesh M. Pisipati, Wolfgang Ebert
  • Polycarbonate compositions having good mold-release properties
    Patent number: 6008280
    Abstract: A thermoplastic molding composition having improved release properties is disclosed. The composition contains a polycarbonate resin and a mold release agent which is a hydroxy ester conforming structurally to ##STR1## where R is a member selected from the group consisting of glycerol, trimethylol propyl and pentaerythritol radicals, R' denotes a C.sub.6-20 hydrocarbon radical having at least one pendant hydroxyl group, and x is 2 to 4.
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: December 28, 1999
    Assignee: Bayer Corporation
    Inventors: Sivaram Krishnan, Jon M. Newcome, James B. Johnson, Ramesh M. Pisipati, Jeffrey M. Tennant