ALEXANDRIA, Va., March 24 -- United States Patent no. 12,584,019, issued on March 24, was assigned to Rockwool A/S (Hedehusene, Denmark).

"Sports field with shock pad comprising lignin-based binder" was invented by Linda De Vries (Hedehusene, Denmark), Dorte Bartnik Johansson (Hedehusene, Denmark) and Miroslav Nikolic (Hedehusene, Denmark).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sports field can comprise: (i) a lower base layer; (ii) an upper grass and/or artificial grass layer, and (iii) a shock pad layer, positioned between the base layer and the grass or artificial grass layer. The shock pad layer can comprise at least one shock pad comprising a coherent plate having upper and lower major surfaces...