Born in Akron, OH, he was the son of the late John Walker Ryon, Jr. and the late Helen Elert Ryon.
John received a BS in Theoretical Physics from Massachusetts Institute of Technology and a PhD in Theoretical Physics from Stephens Institute of Technology and was a professor in Computer Science at the New Jersey Institute of Technology.
He is survived by his son, John W. Ryon, IV of Edison, N.J.; one sister, Christine Ryon Eger of Dallas, TX; a niece, Jennifer Lynn Eger of Austin, TX and a nephew, Douglas Ryon Eger of Dallas, TX.
A funeral service will be conducted at 2:00 p.m., Sunday, April 15, 2012, at the Mausoleum Chapel at Fort Hill Memorial Park. Entombment will follow in the mausoleum.
The family will receive friends from 7:00 to 8:30 p.m., Saturday, April 14, 2012, at Whitten Timberlake Chapel.