Carroll Brown Quaintance, 75. an Arlington patent lawyer and former teacher, died Friday at his home in Sperryville, Va. He suffered fromcancer.

A senior partner in the law firm of Littlepage Quaintance and Ray from 1961 to 1968, he was associated in a semiretired status with its successor, Littlepage Quaintance Murphy Richardson and Webner. He specialized in chemical patents.

Dr. Quaintance was born in Rappa-hannock County, Va. After graduating from the College of William and Mary in 1924, he began teaching in the high school in Staunton, Va.

He then taught in high schools in Woodstown and Cranford, N.J., until 1935. During that period, he earned a master's degree from the University of Pennsylvania and a law degree from Rutgers University.

From 1935 to 1959, Dr. Quaintance worked for law firms in New York City. He also earned a doctorate in education from Columbia University.

He was a member of the D.C., Virginia and American Bar associations and the New York and American Fatent Law associations. He belonged to the American Institute of Chemists, the American Association of Textile Chemists and Colorists, and the American Association for the Advancement of Science.

He is survived by his wife, the former Arthalinda Pancoast, of the home; a daughter, Mrs. Ulrich F. Maeyer, of West Germany; a sister, Mrs. Henry B. Wood, of Woodville, Va.; a brother, John, of Arlington, and three grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Rappahannock Cancer Fund or the Sperryville Rescue Squad.