I found an obit for Allan Edwin Richmond in The Oregonian, Wednesday, October 21, 1992, page C08, through a research database on the Multnomah County Library website. You have to have a library card to access it.
Here are some excerpts from the obit: Name: Allan Edwin Richmond. Residence: in Gresham. Occupation: retired engineer. Place of Death: a Portland-area hospital. Funeral Service: Thurs. 2 p.m. at Skyline Funeral Home chapel. Interment: Skyline Memorial Gardens. Member of: Lincoln Street Baptist Church. Married: in Portland, 1944. Held two college degrees, law & electrical engineering; served as a U.S. Merchant Marine. Survivors: wife Shirley, one son, four grandchldren, two great-grandchildren. One son preceded him in death in 1973. [See obit for additional family information.]
The main library in Gresham has copies of their area newspaper on microfilm. If you contact them, they may be able to find and photocopy whatever obituary that may have appeared in their newspaper. An obituary in the Gresham newspaper may have a better obit with additional information about Allen.
If you need attitional information, contact me at the email address Genforum has for me.