ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,700, issued on May 13, was assigned to HYDRIL COMPANY (Houston).

"Curvilinear sealing system" was invented by Alejandro Juarez (Cypress, Texas) and Nishikant V. Raje (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sealing system connecting first and second tubular members includes a first curvilinear sealing surface on the first tubular member and a second curvilinear sealing surface on the second tubular member. Both the first and second curvilinear sealing surfaces are disposed between two sets of threading on the respective first and second tubular members. When the first and second tubular members are in a connected configuration, the ...