ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,178, issued on March 18, was assigned to Process Combustion Corp. (Pittsburgh).

"Indexing valve for regenerative thermal oxidizer" was invented by Nathan Hess (Pittsburgh), Jordan Lowe (Pittsburgh), Jordan Weichel (Glenshaw, Pa.) and Shaun Mehr (Pittsburgh).

According to the abstract* released by the U.S. Patent & Trademark Office: "An indexing valve for a regenerative thermal oxidizer (RTO). A valve housing includes a diverter assembly further comprising: a pipe shaft, the pipe shaft disposed through the valve housing; a diverter blade subassembly connected to the pipe shaft between the pipe shaft ends for rotating within the valve housing, the rotation of which is supported by...