John Theodore Dickman, age 96, of Delaware, OH, passed away Monday, September 30, 2024. He was born in Hamilton, OH, October 27, 1927. He was the son of the late Reuben and Eleanor (Purpus) Dickman and brother of the late Dr. Charles H. Dickman. He is survived by his loving wife of 68 years, Sue Evelyn (Thrasher) Dickman; children, Ann Cason and William Dickman; grandchildren, Lucas and Henry Dickman; and nephews, David (Barbara), Michael (Becky), and James (Krista) Dickman. John graduated from Fork Union Military Academy (1945) and The Ohio State University (1950). He received his MS from OSU (1957) and PhD in physiological chemistry from OSU (1960), and taught chemistry and physics at Urbana (OH) High School from 1950-1953. He served in the U.S. Army (Korea) from 1953-1955. John retired from Chemical Abstracts Service after 30 years, as Senior Editorial Advisor, in 1990. He was a member of American Chemical Society, Sigma Xi, Phi Lambda Upsilon, and past president of the Association of Earth Science Editors. John and his wife enjoyed growing, exhibiting, and judging roses and were engaged in local, state, and national activities of the American Rose Society (ARS). He wrote a popular Q&A column in the ARS magazine American Rose for 20 years. He was awarded the District Silver Honor Medal and received the ARS Klima Gold Medal for excellence in rose education. John was a life member of the New Bremen (OH) Historical Association, Harmony Lodge #8 F & AM, and 32nd degree Scottish Rite, Valley of Columbus. He was a longtime member of Upper Arlington Lutheran Church where he served as lector for more than 30 years. In 2009, he and Sue moved to Willow Brook at Delaware Run retirement community in Delaware, OH, and cherished the time there among new friends. The family will receive friends at Snyder-Rodman Funeral Center, 101 Valleyside Dr., Delaware, OH Thursday, October 3, 2024, from 1:00 P.M. – 3:00 P.M. and 6:00 P.M. – 8:00 P.M. A memorial service will be held at Upper Arlington Lutheran Church at Mill Run, 3500 Mill Run, Hilliard, OH 43026 Friday, October 4, 2024, at 1:00 P.M. In lieu of flowers, contributions may be made to the Willow Brook Christian Communities. 100 Delaware Crossing West, Delaware, OH 43015 or to a charity of your choice. Interment will be held at a later date in New Bremen, OH. Please visit www.SnyderFuneralHomes.com to leave an online condolence.