ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,965, issued on May 13, was assigned to Marathon Petroleum Co. LP (Findlay, Ohio).

"Systems and methods for mixing hydrogen with natural gas" was invented by Zachary D. Thobe (Findlay, Ohio), Stephen D. Ernst (Findlay, Ohio) and Jason S. Dalton (Findlay, Ohio).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods for injecting hydrogen into a natural gas pipeline to lower the carbon intensity of the resulting fuel blend while achieving the required energy output thereof for the end user. In one embodiment a blend ratio for the blended fuel comprising hydrogen and natural gas is determined based at least in part on a minimum energy output ...