Patents by Inventor Thomas H. Colby

Thomas H. Colby 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).

  • Stabilization of cyanohydrins
    Patent number: 4587060
    Abstract: Cyanohydrins or a solution thereof in an inert solvent are stabilized by treatment with organophosphoric acids.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: May 6, 1986
    Assignee: Shell Oil Company
    Inventors: Thomas H. Colby, Walter Dong
  • Preparation of meta-phenoxytoluene
    Patent number: 4229594
    Abstract: Meta-phenoxytoluene is prepared by treating particular mixtures of sodium and potassium meta-cresylates with an excess of chlorobenzene, under essentially anhydrous conditions, in the presence of meta-cresol, and cuprous chloride as catalyst, at temperatures within the range of from about 150.degree. C. to about 170.degree. C.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: October 21, 1980
    Assignee: Shell Oil Company
    Inventor: Thomas H. Colby
  • Preparation of 3-phenoxybenzaldehyde
    Patent number: 4229380
    Abstract: 3-Phenoxybenzaldehyde is prepared by adding, at a relatively low temperature, a mixture of a 3-phenoxybenzyl halide and a 3-phenoxybenzal halide to a mixture of hexamethylenetetramine, acetic acid and water, the amounts of the water and acid bearing certain relationships to the amount of the mixture of halides, then heating the resulting mixture to a specified temperature level and maintaining it at that level for a specified period of time.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: October 21, 1980
    Assignee: Shell Oil Company
    Inventors: Edgar J. Smutny, Thomas H. Colby
  • Process for preparation of a substituted triazine
    Patent number: 4166909
    Abstract: An improved process is disclosed for the preparation of 2-chloro-4-ethylamino-6-isopropylamino-s-triazine wherein two of the three chlorine atoms on cyanuric chloride are replaced with ispropylamino and ethylamino substituents by sequential reaction of cyanuric chloride in a mixed acetone/water solvent system with isopropylamine and ethylamine, respectively, in the presence of an alkali metal hydroxide acid acceptor.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: September 4, 1979
    Assignee: Shell Oil Company
    Inventors: Thomas H. Colby, Ernest R. Freitas, William R. Durland