Patents by Inventor Pentti Heitala

Pentti Heitala 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 production of diacetylrhein
    Patent number: 6624192
    Abstract: The present invention provides a process for obtaining diacetylrhein, wherein diacetylrhein containing aloe-emodin components is subjected to a liquid—liquid partitioning between a polar organic solvent which is only partly miscible with water and an aqueous phase of pH 6.5 to 7.5 and the diacetylrhein is recovered and optionally recrystallized. The present invention is also concerned with diacetylrhein obtainable by this process and with pharmaceutical compositions containing it.
    Type: Grant
    Filed: November 2, 1994
    Date of Patent: September 23, 2003
    Assignee: Madaus AG
    Inventors: Alfons Carcasona, Wolf Grimminger, Pentti Hêitala, Klaus Witthohn, Helga Zaeske
  • Process for production of diacetylrhein
    Patent number: 5391775
    Abstract: The present invention provides a process for obtaining diacetylrhein, wherein diacetylrhein containing aloe-emodin components is subjected to a liquid-liquid partitioning between a polar organic solvent which is only partly miscible with water and an aqueous phase of pH 6.5. to 7.5 and the diacetylrhein is recovered and optionally recrystallised.The present invention is also concerned with diacetylrhein obtainable by this process and with pharmaceutical compositions containing it.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: February 21, 1995
    Assignee: Madaus AG
    Inventors: Alfons Carcasona, Wolf Grimminger, Pentti Heitala, Klaus Witthohn, Helga Zaeske