Penicillin : biologic 1929-1939 , chemotherapeutic 1939-1949

In 1944, Frank M Berger ( later creator of the post-war drug Miltown but then just a worker in a local municipal public health lab in the remotes of northern England)  came up with an unique way of making and using penicillin.

On second thoughts, his method might well have been done first by Alexander Fleming's Wright-Fleming vaccine institute and their pharmaceutical distributor Parke-Davis about 15 years earlier : Penicillin the Biologic.

On further further reflection : should have been done first by Alec Fleming.

How Parke-Davis could have made a fortune in 1929 from the ultimate in generic drugs : natural penicillin

Parke-Davis, as seen from my folks' homes

A medication made by some natural being out in Nature is the 'ultimate generic drug'  ---- being PD (Public Domain) from its birth, which possibly occurred hundreds of millions of years before Humanity first noticed it.

Penicillin - in theory - is one such 'ultimate generic drug' , but was it in fact, in 1929 ?