Patents by Inventor Hans Peter Lettner

Hans Peter Lettner 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).

  • Method for sterilizing liquid chromatography resins highly resistant to oxidation and a sterilization solution for use therein
    Patent number: 5676837
    Abstract: A method for sterilizing liquid chromatography resins that are highly resistant to oxidation by strongly oxidizing agents and a sterilization solution for use therein. In a preferred embodiment, the invention comprises contacting an oxidant-resistant chromatographic resin with an aqueous solution of peracetic acid and up to 40% ethanol. In particular, where the solution is to be used to sterilize a positively charged ion-exchange resin, the solution preferably additionally includes an acetate buffer of a sufficient ionic strength to prevent adsorption of the peracetic acid ions on the resin.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: October 14, 1997
    Assignee: BioSepra, Inc.
    Inventors: Alois Jungbauer, Hans Peter Lettner