The chemist Arnold Orville Beckman died at the age of 104. Here is all you want to know, and more!
Biography - A Short Wiki
Nobel Prize-winning chemist who is widely credited with revolutionizing the field of chemistry by inventing the acidity-measuring device known as the pH meter. He served as a professor at the California Institute of Technology and founded the laboratory instrument company Beckman Instruments.
He married his wife Mabel in June 1925.