John Gannon Obituary

We announce the death of John Gannon of Menlo Park, California, who passed away on August 21, 2026, at the age of 84. John will be remembered by family members, friends, and others whose lives were connected in meaningful ways. Leave a sympathy message to the family on the memorial page of John Gannon to pay them a last tribute.

He was predeceased by: his parents, Jack Gannon and Antoinette Gannon (Nugent). He is survived by: his significant other James Rytuba; his siblings, Maureen Cusick, Kathy Gannon (Gene Vactor), Tom Gannon (Joanne) of Pittsburgh, Pennsylvania, Mike Gannon (Holly) of Pittsburgh, Pennsylvania and David Gannon of Pittsburgh, Pennsylvania; his nieces and nephews, Kelly Caputo, Jamie Fenwick, Caitlan Paschalides, Brian Gannon, Matt and Steve Cusick; and his great-nieces and great-nephews, Louie, Ava, Finn, Addy, Joey, Livi, Michael, Shane, Griffin and Jack.

At Chevron Research, he made important contributions to the development of gasoline additives that came into widespread use.