Lange K Robert, Schiesser Robert H, Tonkyn Richard G, Dean deceased Russell T, Dean executrix by S Martha: Acrylamido-sulfonic acid polymers and their use. Betz Laboratories, Ricci Alexander D, August 5, 1975: US3898037 (89 worldwide citation)

The present disclosure is directed to polymers and copolymers of acrylamido-sulfonic acid compounds and their use basically as dispersants for particles contained in aqueous systems. Exemplary of the sulfonic acid compound is 2-acrylamido-2-methylpropane sulfonic acid, or water-soluble salt thereof; ...