This inventor holds 2 USPTO granted patents. Top assignees: Mobay Chemical Corporation, Bayer Aktiengesellschaft. Active years: 1977.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
2 out of 191 
1 out of 12,269 
Years Active: 1977
Title: The Innovations of Donovan Norman Smith, Jr.
Introduction
Donovan Norman Smith, Jr. is an accomplished inventor based in Kansas City, MO (US). He holds 2 patents that showcase his contributions to the field of chemistry and chemical processes. His work has significantly impacted the production methods of various chemical compounds.
Latest Patents
One of his latest patents involves the production of pinacolone. In this process, 4,4,5-trimethyl-1,3-dioxane is contacted with aqueous acid to produce pinacolone. The improvement in this method comprises effecting the contact in the presence of 2-methyl-but-2-ene, which increases the yield of pinacolone. The 2-methyl-but-2-ene is present in approximately equimolar amounts with the 4,4,5-trimethyl-1,3-dioxane, and the acid used is HCl of about 30 to 40% concentration or HBr of about 30 to 50% concentration.
Another significant patent by Smith involves the methyl bromide thiol methylation of the mercapto group. In this process, 4-amino-6-t-butyl-3-mercapto-1,2,4-triazin-5-one is methylated to produce 4-amino-6-t-butyl-3-methylmercapto-1,2,4-triazine-5-one using methyl bromide. The reaction is conducted in the absence of air to avoid product coloration. Considerable agitation is employed along with recycling, especially with an emulsifying agent that markedly speeds up the reaction. Measures such as operating under a slight vacuum and recycling unused methyl bromide and mother liquor are implemented to improve yield and minimize environmental impact.
Career Highlights
Throughout his career, Donovan has worked with notable companies such as Mobay Chemical Corporation and Bayer Aktiengesellschaft. His experience in these organizations has contributed to his expertise in chemical processes and innovations.
Collaborations
Donovan has collaborated with several professionals in his field, including Karlfried Dickore and Johann Dahm. These collaborations have further enriched his work and expanded his contributions to the industry.
Conclusion
Donovan Norman Smith, Jr. is a notable inventor whose work in chemical processes has led to significant advancements in the production of
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile