Patents by Inventor Daniel Rehm

Daniel Rehm 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).

  • Phenolic antioxidants in crystalline form
    Patent number: 7262319
    Abstract: The invention relates to a process for preparing solid particles of a phenolic antioxidant from the IRGANOX series in the form of crystals, particularly IRGANOX 1010 and 1098, the crystal particles obtainable by the process, the further processing of the crystal particles, an aqueous dispersion comprising the phenolic antioxidant, novel crystal modifications of pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate] (?-form) and N,N?-hexane-1,6diyl-bis[3-(3,5-di-tert-butyl-4-hydroxypheylpropamide)] (?-form) and aqueous dispersion comprising the new crystal modifications.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: August 28, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Daniel Rehm, Johannes Schäfter, Paul Adriaan Van Der Schaaf, Christian Guckel
  • Phenolic antioxidants in crystalline form
    Publication number: 20060189820
    Abstract: The invention relates to a process for preparing solid particles of a phenolic antioxidant from the IRGANOX series in the form of crystals, particularly IRGANOX 1010 and 1098, the crystal particles obtainable by the process, the further processing of the crystal particles, an aqueous dispersion comprising the phenolic antioxidant, novel crystal modifications of pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate] (?-form) and N,N?-hexane-1,6diyl-bis[3-(3,5-di-tert-butyl-4-hydroxyphenylpropionamide)] (?-form) and aqueous dispersion comprising the new crystal modifications.
    Type: Application
    Filed: November 17, 2003
    Publication date: August 24, 2006
    Inventors: Daniel Rehm, Johannes Schafter, Paul Van Der Schaaf, Christian Guckel