WOW - interesting article thank you for posting.
From your linked page:
Sterilization rates under eugenic laws in the United States climbed from 1927 until Skinner v. Oklahoma, 316 U.S. 535 (1942). While Skinner v. Oklahoma did not specifically overturn Buck v. Bell, it created enough of a legal quandary to discourage many sterilizations. By 1963, sterilization laws were almost wholly out of use, though some remained officially on the books for many years. Virginia's state sterilization law was repealed in 1974.