ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,870, issued on Oct. 21, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).

"Carbon rich layer for scale control" was invented by Manuel Marya (Sugar Land, Texas), Virendra Singh (Sugar Land, Texas) and Alireza Zolfaghari (Rosharon, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system may include a substrate having a tensile strength of at least 10,000 PSI at an ambient temperature. The system may also include a carbon rich layer deposited on the substrate, wherein the carbon rich layer comprises at least one of a carbide, a nitride, a boride, a silicide, an oxide, a sulfide, or a transition-metal or non-metal ceramic-forming...