This inventor holds 3 USPTO granted patents and 2 published patent applications, plus 1 CIPO patent. Top assignee: Dowelanco. Active years: 1992-1994.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1992-1994
Title: Clark P Allphin: Innovator in Chemical Engineering
Introduction
Clark P Allphin is a notable inventor based in Concord, CA (US). He has made significant contributions to the field of chemical engineering, particularly in the area of chlorination processes. With a total of 3 patents to his name, Allphin's work has implications for the production of important chemical intermediates.
Latest Patents
Allphin's latest patents include innovative methods for the selective gas phase chlorination of polychlorinated .beta.-picolines. This process results in the production of 2,3,5,6-Tetrachloropyridine and 2,3-dichloro-5-(trichloromethyl)pyridine. These compounds are synthesized by selectively chlorinating polychlorinated .beta.-picolines in the vapor phase at temperatures between 250°C and 450°C, utilizing specific Lewis acid halide catalysts on an inorganic support. Notably, the gamma position on the pyridine ring is typically not chlorinated in either the starting material or the reaction products. These compounds serve as useful intermediates for the production of insecticides and herbicides.
Another significant patent involves the preparation of pyridinecarboxylic acid chlorides from (trichloromethyl)pyridines. This process entails passing vapors of a (trichloromethyl)pyridine compound over gamma-alumina at temperatures ranging from 250°C to 450°C. The result is the formation of pyridinecarboxylic acid chloride compounds, such as 2,3-dichloronicotinoyl chloride. This compound can subsequently be converted into its acid, an ester, or an amide, including 2,3-dichloronicotinic acid, methyl 2,3-dichloronicotinate, or N-methyl-2,3-dichloronicotinamide, through treatment with water, an aliphatic alcohol, or ammonia or an alkylamine, respectively.
Career Highlights
Clark P Allphin is currently associated with Dowelanco, where he continues to innovate in the field of chemical processes. His work has been instrumental in advancing methodologies that enhance the efficiency and effectiveness of chemical production.
Collaborations
Throughout his career, Allphin has
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile