ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,244, issued on May 27, was assigned to Saudi Arabian Oil Co. (Dharhran, Saudi Arabia).

"Method for manufacture of mesoporous silica in the presence of thermally expandable microcells" was invented by Robert Peter Hodgkins (Dhahran, Saudi Arabia) and Omer Refa Koseoglu (Dhahran, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods of synthesis of mesoporous silica are disclosed. The mesoporous silica synthesized herein, like SBA-15, possesses a two-dimensional, hexagonal, through-hole structure with a space group p6mm. An effective quantity of one or more thermally expandable microcells are used during synthesis to impart distinct char...