Patents by Inventor Ildiko Vidra nee Sandor

Ildiko Vidra nee Sandor 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 diacyl-dianhydro hexitols
    Patent number: 4820852
    Abstract: The subject of the invention is an improved process for the industrial scale preparation of the compounds of the formula ##STR1## and salts thereof by acylating the hexitols of the formula (II) with an anhydride of the formula (II) at a temperature of 0.degree.-30.degree. C. in the presence of an organic base and a catalyst of the formula (IV) in a dipolar-aprotic or aprotic solvent.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: April 11, 1989
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara
    Inventors: Tibor Szabo, Ildiko Vidra nee Sandor, Gyula Dalmadi, Judit Kaczmarek nee Sebestyen, Janos ri