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.’
24th April 1916: The Easter Rising begins in Dublin
24th April 2020
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.
11th November 1918: WW1 Armistice of Compiègne is signed
11th November 2018
9th November 1989: East Germany opens the Berlin Wall
9th November 2019
1st September 1939: Nazi Germany invades Poland
1st September 2018