Patents by Inventor Thomas Heinrich Sieker

Thomas Heinrich Sieker 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).

  • Rigid polyurethane foams
    Patent number: 6528549
    Abstract: Polyol blend comprising a polyester polyol, a tertiary amine catalyst and an organic carboxylic acid wherein said carboxylic acid contains at least one OH, SH, NH2 or NHR functional group, wherein R is an alkyl, cycloalkyl or aryl group and the use of said polyol blend in the manufacture of rigid polyurethane foams.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: March 4, 2003
    Assignee: Imperial Chemical Industries PLC
    Inventors: Thomas Heinrich Sieker, Franco Gabrieli, Saskia Rachel Walraedt
  • Rigid polyurethane foams
    Publication number: 20020123598
    Abstract: Polyol blend comprising a polyester polyol, a tertiary amine catalyst and an organic carboxylic acid wherein said carboxylic acid contains at least one OH, SH, NH2 or NHR functional group, wherein R is an alkyl, cycloalkyl or aryl group and the use of said polyol blend in the manufacture of rigid polyurethane foams.
    Type: Application
    Filed: March 6, 2002
    Publication date: September 5, 2002
    Applicant: Imperial Chemical Industries PLC
    Inventors: Thomas Heinrich Sieker, Franco Gabrieli, Saskia Rachel Walraedt
  • Rigid polyurethane foams
    Patent number: 6403665
    Abstract: Polyol blend comprising a polyester polyol, a tertiary amine catalyst and an organic carboxylic acid wherein said carboxylic acid contains at least one OH, SH, NH2 or NHR functional group, wherein R is an alkyl, cycloalkyl or aryl group and the use of said polyol blend in the manufacture of rigid polyurethane foams.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: June 11, 2002
    Assignee: Imperial Chemical Industries PLC
    Inventors: Thomas Heinrich Sieker, Franco Gabrieli, Saskia Rachel Walraedt
  • Rigid polyurethane foams
    Patent number: 6346205
    Abstract: Process for making rigid polyurethane or urethane-modified polyisocyanurate foams comprising the step of reacting an organic polyisocyanate composition with an isocyanate-reactive composition comprising a polyester polyol in the presence of an amine catalyst characterised in that the pKa of the conjugated ammonium salt of said amine is less than 12.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: February 12, 2002
    Assignee: Huntsman International LLC
    Inventors: Thomas Heinrich Sieker, Franco Gabrieli
  • Rigid polyurethane foams
    Publication number: 20010006986
    Abstract: Process for making rigid polyurethane or urethane-modified polyisocyanurate foams comprising the step of reacting an organic polyisocyanate composition with an isocyanate-reactive composition comprising a polyester polyol in the presence of an amine catalyst characterized in that the pKa of the conjugated ammonium salt of said amine is less than 12.
    Type: Application
    Filed: January 18, 2001
    Publication date: July 5, 2001
    Applicant: Imperial Chemical Industries PLC
    Inventors: Thomas Heinrich Sieker, Franco Gabrieli
  • Rigid polyurethane foams
    Patent number: 6207725
    Abstract: Process for making rigid polyurethane or urethane-modified polyisocyanurate foams comprising the step of reacting an organic polyisocyanate composition with an isocyanate-reactive composition comprising a polyester polyol in the presence of an amine catalyst characterized in that the pKa of the conjugated ammonium salt of said amine is less than 12.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: March 27, 2001
    Assignee: Imperial Chemical Industries PLC
    Inventors: Thomas Heinrich Sieker, Franco Gabrieli