Jackson County IA Archives Biographies.....Tinker, John M. 
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File contributed for use in USGenWeb Archives by:
Ken Wright wright@prestontel.com February 18, 2012, 9:32 pm

Source: Jackson Sentinel
Author: Jackson Sentinel

Jackson Sentinel, April 7, 1944- 

John M. Tinker, son of Mrs. Helen Tinker, of Maquoketa, was honored by the 
employees of duPont laboratory in Wilmington, Delaware, on Tinker's 25th 
anniversary with the company. 

Mr. Tinker was born in Maquoketa and attended schools here. He completed work 
at the University of Chicago in 1918 and entered the U. S. Army for one year. 
He was stationed with the 878th Aero Squadron at Dallas, Texas, where he 
advanced to the rank of sergeant. 

In 1919 Mr. Tinker entered the employ of the Newport Chemical Company, at 
Carrollville, Wisconsin, carrying out research work on naphthalene 
intermediates. He was placed in charge of dyestuff intermediate research at 
Newport laboratory in 1929. He was transferred to Jackson laboratory in 
Wilmington in 1931 and named division head of the new products division. He 
was appointed assistant director of Jackson laboratory in 1938 and director in 
1943. 



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