Patents by Inventor Carl Postuma

Carl Postuma 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 of preparing purified alkanesulfonic acid
    Patent number: 5583253
    Abstract: A process of preparing purified alkanesulfonic acid from crude aqueous alkanesulfonic acid containing oxidizable impurities wherein the crude material is treated with a sufficient amount of chlorine to convert the oxidizable impurities to alkanesulfonyl chloride and then hydrolyzing said alkanesulfonyl chloride to alkanesulfonic acid by heating.
    Type: Grant
    Filed: March 27, 1991
    Date of Patent: December 10, 1996
    Inventors: Phyllis A. Henderson, Steven G. Schon, Carl Postuma