State of Nevada Marriage index (at ancestry.com) Name: Francis Charles Ringler Gender: Male Residence State: California Spouse: Peggy Eileen Barker Spouse residence state: California Marriage Date: 20 Feb 1971 Marriage city: Carson City Officiant type: Religious celebrant Recorded date: 12 Mar 1971 Recorded city: Carson City
California Divorce Index Name: Francis C Ringler, born 1952 Spouse Name: Peggy E Barker, born 1953 Location: Stanislaus Date: Oct 1976 Case No. 139819/State File No. 142713
State of Nevada marriage index Name: Francis C Ringler Gender: Male Residence State: California Spouse: Virginia Garcia Spouse residence state: California Marriage Date: 3 Jun 1998 Marriage County: Washoe Recorded date: 8 Jun 1998 Recorded city: Reno Book: 1000 Page: 1068 Instrument number: MA98-9310
Found at www.findgrave.com Just type in Ringler and California and you will find grandparents and parents of Francis Charles Ringler.
I was not able to find any indication of obituary or place of burial for Francis Charles Ringler.You might contact the cemetery where his parents are buried--perhaps he's there.