The first U.S. patent was awarded to Samuel Hopkins for an improvement ‘in making Pot ash and Pearl ash by a new Apparatus and Process.’
Marie and Pierre Curie proved the existence of the new element radium when they chemically isolated one-tenth of a gram of pure radium chloride.
The DuPont company’s organic chemist Wallace Carothers received a patent for linear condensation polymers, the basis of the material better known as nylon.
On the 6th March 1869, Russian chemist Dmitri Mendeleev presented his periodic table to the Russian Chemical Society.
Thomas Midgeley Jr. discovered that adding tetraethyl lead to gasoline reduced knocking in automobile engines.
15th August 2020
14th August 2020
11th November 2018
9th November 2019
1st September 2018