Light Rain Fog/Mist and 41 F at Pittsburgh - Allegheny County Airport, PA
Winds are Northwest at 10.4 MPH (9 KT). The pressure is 1009.1 mb and the humidity is 96%.The wind chill is 35. Last Updated on Apr 18 2020, 2:53 am EDT. More...

Charles Goodyear Granted Patent for Vulcanization (1844)
Goodyear was the inventor of vulcanization, a process that makes rubber harder, less soluble, and more durable. Previously, rubber products were sticky and volatile, often melting in heat or hardening in cold. He obtained a patent for vulcanization in 1844 but was still badly in debt at the time of his death. Goodyear had no official connection to the famed Goodyear Tire Company, which was founded decades later and named in his honor. Why was he in prison when he began experimenting with rubber? Discuss
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