Waldo Semon Death Anniversary

Waldo Semon cover image
  1. Home
  2. Events
  3. Events on 26 May
  4. Waldo Semon Death Anniversary

Waldo Semon died on 26 May, 1999

American chemist best known for inventing vinyl, the second most used plastic in the world. He made close to 5,000 other synthetic rubber compounds and held 116 patents.