Arthur Ray Maupin, 77, a retired real estate broker and government engineer, died of Parkinson's disease Tuesday at Potomac Valley nursing home in Rockville.

Mr. Maupin was a native of Cash, Okla., and was a 1925 graduate of Phillips University in Enid, Okla. He earned a master's degree in physics at the University of Kansas.

He taught for a year at the Georgia Institute of Technology, then taught mathematics at the Naval Academy at Annapolis from 1928 to 1933.

After spending two years working on engineering projects for the Boulder Dam, he came to Washington in 1935 and became a research physicist in the copper and brass division of the National Bureau of Standards.

During World War II he was an administrator for the Office of Price Administration and then was with the War Production Board.

Mr. Maupin was an engineer with the General Services Administration for 13 years before retiring from the government in 1958.

After leaving the GSA he lived in Annapolis where he was a real estate broker. He had lived in the Potomac Valley nursing home for the past year.

Mr. Maupin was a member of the American Society for Metals and Hope Masonic Lodge in Silver Spring.

His wife of 51 years, the former Gladys L. Haskin, died in 1977.

Survivors include three daughters, Dorothy R. Brodie of McLean, Grace E. Emert of Bethesda, and Nancy J. Snider of Rockville, and four grandchildren.