Burt Lopatin, 75, a real estate investor and former Washington restaurant owner who was active in civic organizations in Alexandria, died Jan. 17 in Alexandria Hospital after a heart attack. He had lived in Alexandria since 1939.

Mr. Lopatin owned and operated restaurants in Washington from 1932 to 1953. These establishments included Burt's Trans-Lux Restaurant near the intersection of 14th Street and New York Avenue.

He had operated Burt Lopatin Real Estate Investments in Alexandria since the early 1950s. He was a senior member of the American Society of Appraisers and a member of the Society of Residential Appraisers. He had been a member of the Junior Chamber of Commerce in Washington.

During the 1950s and 1960s, Mr. Lopatin was chairman of the Alexandria Board of Zoning Appeals and served on the city's Redevelopment and Housing Authority. He was a founder and past president of the Northeast Citizens Association in Alexandria.

Mr. Lopatin came to Washington at an early age from Russia. He served with the Coast Guard in Alaska during World War II.

He was a life member of the National Masonic Lodge and a member of the Scottish Rite.

Survivors include his wife, Margaret, of Alexandria; a daughter, Darlene Slaymaker, of Albany, Ga.; a brother, Albert, of Silver Spring; a sister, Sara Abrams, of Miami Beach, Fla., and three grandchildren.