ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,775, issued on Dec. 9, was assigned to SAUDI ARABIAN OIL COMPANY (Dhahran, Saudi Arabia).
"Temporary trap door cap" was invented by Mohammed N Al Shammari (Dammam, Saudi Arabia).
According to the abstract* released by the U.S. Patent & Trademark Office: "A temporary trap door cap device for sealing around a pressure-leaking trap door at an end of a pipeline terminating in a trap includes a canister formed from a longitudinally extending pipe having an open end and a closed end; and an annular rim connected to the open end, with an inner diameter smaller than an inner diameter of the canister. The annular rim is configured such that the inner diameter of the annular rim fits over t...