On February 17, 1976, U.S. Patent No. 3,939,151 issued to Thomas Sheehan for Displacement of the Thiazolidine Ring in Penicillin with the Formation of a Biologically Active Cephem System — a synthetic Penicillin.
Category Archives: Patent of the Day
February 16 Patent of the Day
February 15 Patent of the Day
February 14 Patent of the Day
On February 14, 1871, U.S. Patent No. 111,798 issued to Thomas Adams on an Improvement in Chewing-Gum.
Adams conceived the idea while working as a secretary to former Mexican leader Santa Anna, who chewed a natural gum called chicle. After failing to turn it to a rubber suitable for tires, he made the chicle into a chewing gum called Chiclets.