Patents by Inventor Jacqueline Lau

Jacqueline Lau 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 the preparation of 5-perfluoroalkyl substituted benzotriazole UV absorbers
    Patent number: 6353113
    Abstract: A process for preparing 2H-benzotriazole UV absorbers containing a perfluoroalkyl moiety at the 5-position of the benzo ring, preferably a trifluoromethyl group, involves diazotizing the perfluoroalkyl substituted o-nitroaniline using concentrated sulfuric acid plus sodium nitrite or preferably nitrosylsulfuric acid to form the corresponding monoazobenzene intermediate via the diazonium salt intermediate which is reduced to the corresponding 5-perfluoroalkyl substituted 2H-benzotriazole UV absorber compound by conventional reduction means.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: March 5, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mervin G. Wood, Deborah DeHessa, Andrew B. Naughton, Jerome Sanders, Jacqueline Lau, Rong Xiong, Joseph Babiarz
  • Asymmetrical bisbenzotriazoles substituted by a perfluoroalkyl moiety and compositions stabilized therewith
    Patent number: 6337402
    Abstract: Asymmetrical bisbenzotriazoles of the formula I where G2′ is perfluoroalkyl of 1 to 12 carbon atoms, preferably CF3, and where G2 does not contain said group are red-shifted and due to the asymmetry are particularly soluble and useful in a host of applications including automotive coatings, thermoplastics and especially in adhesive compositions, themselves useful in solar panels and other laminate structures.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: January 8, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mervin Wood, Jacqueline Lau, Ramanathan Ravichandran
  • Asymmertical bisbenzotriazoles substituted by a perfluoroalkyl moiety and compositions stabilized therewith
    Publication number: 20010011113
    Abstract: Asymmetrical bisbenzotriazoles of the formula I 1
    Type: Application
    Filed: January 22, 2001
    Publication date: August 2, 2001
    Inventors: Mervin Wood, Jacqueline Lau, Ramanathan Ravichandran
  • Asymmetrical bisbenzotriazoles substituted by a perfluoroalkyl moiety
    Patent number: 6245915
    Abstract: Asymmetrical bis benzotriazoles of the formula I where G2′ is perfluoroalkyl of 1 to 12 carbon atoms, preferably CF3, and where G2 does not contain said group are red-shifted and due to the asymmetry are particularly soluble and useful in a host of applications including automotive coatings, thermoplastics and especially in adhesive compositions, themselves useful in solar panels and other laminate structures.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: June 12, 2001
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mervin Wood, Jacqueline Lau, Ramanathan Ravichandran