Patents by Inventor Thomas E. Hamill

Thomas E. Hamill 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).

  • Monophosphate salt of o-cresolphthalein
    Patent number: 3975405
    Abstract: O-cresolphthalein monophosphoric acid and salts thereof useful as substrates for alkaline phosphatase determinations are produced by reacting cresolphthalein with dibenzyl phosphite in the presence of carbon tetrachloride and an organic amine, hydrogenating the reaction product, recovering o-cresolphthalein monophosphoric acid from the hydrogenation product, and reacting the acid with bases to produce desired salts.
    Type: Grant
    Filed: August 1, 1974
    Date of Patent: August 17, 1976
    Assignee: Coulter Diagnostics, Inc.
    Inventor: Thomas E. Hamill