Patents by Inventor Donovan Norman Smith, Jr.

Donovan Norman Smith, 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).

  • Patent number: 4059634
    Abstract: In the process wherein 4,4,5-trimethyl -1,3-dioxane is contacted with aqueous acid to produce pinacolone, the improvement which comprises effecting the contact in the presence of 2-methyl-but-2-ene, whereby the yield of pinacolone is increased. Advantageously the 2-methyl-but-2-ene is present in approximately equimolar amount with the 4,4,5-trimethyl-1,3-dioxane and the acid is HCl of about 30 to 40% concentration or HBr of about 30 to 50% concentration.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: November 22, 1977
    Assignee: Mobay Chemical Corporation
    Inventor: Donovan Norman Smith, Jr.
  • Patent number: 4035364
    Abstract: In the methylation of 4-amino-6-t.-butyl-3-mercapto-1,2,4-triazin-5-one to produce 4-amino-6-t.-butyl-3-methylmercapto-1,2,4-triazine-5-one using methyl bromide, the reaction is run in the absence of air whereby product coloration is avoided. Desirably considerable agitation is employed along with recycle and especially with an emulsifying agent which markedly speeds up the reaction. Measures such as operating under a slight vacuum and recycle of unused methyl bromide and mother liquor are employed to improve the yield and to avoid the problems of discharging the bromides to the environment.
    Type: Grant
    Filed: July 26, 1976
    Date of Patent: July 12, 1977
    Assignees: Bayer Aktiengesellschaft, Mobay Chemical Corporation
    Inventors: Karlfried Dickore, Walter Merz, Johann Dahm, Donovan Norman Smith, Jr.