ALEXANDRIA, Va., April 21 -- United States Patent no. 12,604,855, issued on April 21, was assigned to Simply Paws Design LLC (St. Paul, Minn.).
"Animal litter and litter box system" was invented by Patricia Lynne Weber (St. Paul, Minn.) and Kevin Jon Weber (St. Paul, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pelletized, environmentally friendly animal litter. The animal litter includes birch bark waste in pellet form that is mostly hydrophobic to allow liquid waste to quickly pass therethrough while trapping a small amount of waste therein that adheres to the surface of the pellet and is then absorbed over time. The litter is used in a litter box system that includes a base, a drawer slidably re...