Before revision: The most recent patent regarding Deckard's SLS technology was issued 28 January 1997 and expired 28 Jan 2014.US5597589 A similar process was patented without being commercialized by R. F. Housholder in 1979.Housholder, R., "Molding Process", , filed December 3, 1979, published January 27, 1981.
After revision: The most recent patent regarding Deckard's SLS technology was issued January 28, 1997 and expired 28 ,January 2014.US5597589 A similar process was patented without being commercialized by R. F. Housholder in 1979.Housholder, R., "Molding Process", , filed December 3, 1979, published January 27, 1981.