Patents by Inventor Zsuzsanna Lengyel nee Szemenyei

Zsuzsanna Lengyel nee Szemenyei 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).

  • Microbiological process for preparing 9.alpha.-hydroxy-4-androstene-3,17-dione
    Patent number: 5004695
    Abstract: The invention relates to a process for the production of 9.alpha.-hydroxy-4-androstene-3,17-dione from natural sterols of plant or animal origin or from mixtures thereof by the submerged aerobic fermentation of an enzyme-deficient, sterol-de-grading microorganism in a nutrient medium containing utilizable carbon and nitrogen sources as well as mineral salts, and by isolating the product formed, which comprises transforming the sterol or sterol mixture with the culture of a 1,2-steroid-dehydrogenase deficient strain of new Mycobacterium roseum species which is able to degrade the side-chain of natural sterols, preferably with Mycobacterium roseum sp. nov. 1108/1 deposited at the National Collection of Agricultural and Industrial Microorganisms, Budapest, Hungary under the number NCAIM B (P) 000339, and by isolating and purifying the 9.alpha.-hydroxy-4-androstene-3,17-dione obtained.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: April 2, 1991
    Assignee: Richter Gedeon Vegyeszeti Gyar R.T.
    Inventors: Antonia Jekkel nee Bokany, Karoly Albrecht, Gabor Ambrus, Tibor Lang, Istvan M. Szabo, Eva Ilkoy, Kalman Konczol, Imre Moravcsik, Gabor Hantos, Emilia Simonovits, Zsuzsanna Lengyel nee Szemenyei, Zsuzesanna Vida, Eva Csajagi