US Patent Issued to The Swatch Group Research and Development on Sept. 15 for "Phosphorescent elastomer master mixture and horological component comprising such a mixture" (Swiss Inventors)

ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,735,629, issued on Sept. 15, was assigned to The Swatch Group Research and Development Ltd (Marin, Switzerland).

"Phosphorescent elastomer master mixture and horological component comprising such a mixture" was invented by Sophie Napoli (Neuchatel, Switzerland) and Nicolas Francois (Neuchatel, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a master mixture comprising: from 40 to 95% by weight of a photoluminescent pigment, said pigment having a particle size limited by sifting at 30 micro metre; 5 to 60% by weight of a polymer in the form of an elastomer or an elastomer precursor chosen from fluorinated poly...