US Patent Issued to Bay Materials on April 22 for "Dual shell dental appliance and material constructions" (California Inventors)

ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,572, issued on April 22, was assigned to Bay Materials LLC (Fremont, Calif.).

"Dual shell dental appliance and material constructions" was invented by Ray F. Stewart (Blairsden, Calif.) and John Lahlouh (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Improved dental appliances and polymeric sheet compositions are disclosed. The polymeric sheet compositions are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MPA to 2,500 MPA ("hard") and an inner core comprised of elastomeric material or materials having a modulus of from about 50 MPa to 500 MPa ("soft"), which exhib...