ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,537, issued on Dec. 9, was assigned to Derrick Corp. (Buffalo, N.Y.).
"Injection molded screening apparatuses and methods" was invented by Keith Wojciechowski (Lakeview, N.Y.) and James R. Colgrove (East Aurora, N.Y.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A disclosed screening apparatus includes a subgrid, and a screen element attached to the subgrid via laser welding at a plurality of attachment positions such that, under vibrational excitation, the screen element has a pre-determined profile of vibrational motion relative to the subgrid. The screen element may be attached at a maximal number of attachment locations to the subgrid to minimiz...