Patents by Inventor James Hendrickson, Jr.

James Hendrickson, Jr. 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).

  • Continuous production of silicon tetrafluoride gas in a vertical column
    Patent number: 4470959
    Abstract: Silicon tetrafluoride gas is produced by reacting aqueous fluosilicic acid and concentrated sulfuric acid in a vertical column. The fluosilicic acid is fed to an intermediate point of the column and the sulfuric acid to the top of the column. Silicon dioxide, both dissolved and suspended, is fed with fluosilicic acid in some forms so as to produce a by-product acid substantially free of silicon and fluoride values.
    Type: Grant
    Filed: June 20, 1983
    Date of Patent: September 11, 1984
    Assignee: Allied Corporation
    Inventors: Jaidev S. Talwar, James Hendrickson, Jr.