Retired Col. Louis G. Klinker, 67, an Army metallurgist and chemical engineer for 35 years before retiring from active duty in 1969, died of Cancer Saturday at the Iliff Nursing Facility in Dunn Loring.

He served in West Germany during the late 1950s and was in Vietnam from 1964 to 1965. During the early and late 1960s, Col. Klinker was a special projects officer and branch deputy of the Army's Office of Command Research and Development in Arlington.

After retiring, he spent two years as a senior research scientist and associate professor at the Georgia Institute of Technology, where he taught chemistry and metallurgy.

From 1971 until retiring for reasons of health in 1977, he was deputy director of production for the Army Foreign Science and Technology Center in Charlottesville.

Col. Klinker was a native of Indiana. He earned undergraduate degrees in chemistry at Purdue University and metallurgy at Youngstown State University in Ohio.

His military decorations included the Meritorious Service Medal, the Joint Services Commendation Medal, the Army Commendation Medal with oak leaf cluster, and the Vietnamese Medal of Honor.

Col. Klinker was a member of St. Leo's Catholic Church in Fairfax and belonged to the Knights of Columbus. He also was a member of the American Society of Metals.

Survivors include his wife, Mary H., of the home in Vienna; four daughters, Mary K. Swayze of Bethesda, Susan E. Collis of Dallas, Diane M. Hoefling of Vienna, Patrice J. Hersh of Peekskill, N.Y.; two sons, L. Michael of Annanadale and Timothy G. of Vienna; a brother, Dr. J. Edward of Vincennes, Ind., and seven grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to a local Right to Life Chapter or to the American Cancer Society.