Blanche Harriman Porter, 89, a retired employe of the U.S. Patent Office and a member of the Daughters of the American Revolution and other groups, died of kidney failure Tuesday at the Columbia Hospital for Women in Washington.

Mrs. Porter was born in Minnewaukan, N.D., and grew up there. She graduated from Randolph-Macon Women's College in Lynchburg, Va., and moved to Washington in 1918.

She began her career at the Patent Office in the same year. She met her husband, Floyd J. Porter, a judge of the Patent Office board of appeals, at work. Mrs. Porter worked in the records section at the Patent Office until her retirement in 1946.

She was a member of the Mary Washington Chapter of the DAR and was the D.C. chapter of the Daughters of the American Colonists.

Other activities included membership in the Women's Club of Chevy Chase and a term as treasurer of the Pan-American Liaison Committee, a women's organization. She was a member of the Randolph-Macon Alumnae Association and of All Saints Episcopal Church in Chevy

Mrs. Porter lived in Chevy Chase until about three years ago, when she moved to the Fernwood House nursing facility in Bethesda.

Her husband died in 1961. She leaves no immediate survivors.