Patents by Inventor Dale E. Malzahn

Dale E. Malzahn 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 recovering anhydrous alkanesulfonic acids by reduced pressure, falling film evaporation
    Patent number: 4450047
    Abstract: Water is removed from methanesulfonic acid to produce an anhydrous product of high purity by spraying wet methanesulfonic acid (MSA) onto the walls of a vertical, heated tube which is maintained at reduced pressure. The water evaporates as the acid flows down the walls of the tube and dry MSA is removed at the bottom.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: May 22, 1984
    Assignee: Penwalt Corporation
    Inventor: Dale E. Malzahn