ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,420,258, issued on Sept. 23, was assigned to Sartorious Stedim Biotech GmbH (Gottingen, Germany).
"Diatomaceous earth composition with a low endotoxin content" was invented by Karl Pflanz (Gleichen, Germany), Florian Hebenstreit (Beberstedt, Germany) and Andreas Pickl (Klein Schneed, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a diatomaceous earth composition with a low endotoxin content, comprising an agglomerated mixture of calcined diatomaceous earth particles and water, wherein the mass ratio of calcined diatomaceous earth particles and water is in the range of 1:1.0 to 1:2.0, and wherein the endotoxin co...