Patents by Inventor John L. Irvine

John L. Irvine 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).

  • Increasing alumina slurry life
    Patent number: 4191737
    Abstract: Alumina slurries (suspensions) can be stabilized against viscosity increases by treating with water which has been heated to temperatures of from about 40.degree. C. to about 100.degree. C., then cooling, decanting the water, and recovering a wet cake. Water is then added to the recovered wet cake alumina to obtain a slurry with a desired alumina content and CO.sub.2 is sparged through the finished slurry. Optionally, hot water saturated with carbon dioxide can be used for the treatment, to extend the stability of the slurry. Peptizing agents can be used as usual.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: March 4, 1980
    Assignee: Conoco, Inc.
    Inventor: John L. Irvine
  • 7-Substituted-2-indolinones
    Patent number: 4020179
    Abstract: The compounds are 7-substituted-2-indolinones which are useful as anticonvulsant agents. Representative of the compounds are 7-chloro-3-hydroxy-3-phenyl-indolin-2-one, 7-bromo-3-hydroxy-3-phenyl-2-indolinone, and 7-chloro-3-hydroxy-3-methyl-2-indolinone.
    Type: Grant
    Filed: May 15, 1975
    Date of Patent: April 26, 1977
    Assignee: Richardson-Merrell Inc.
    Inventor: John L. Irvine