ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,645, issued on Dec. 23, was assigned to NORWEGIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY (NTNU) (Trondheim, Norway).

"Carbon hollow fibre membrane" was invented by Linfeng Lei (Shanghai), Arne Lindbrathen (Tiller, Norway) and Xuezhong He (Trondheim, Norway).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for the production of asymmetric cellulose hollow fibres and the use of such fibres in the production of asymmetric carbon hollow fibre membranes (CHFMs). In particular, the present invention provides a facile and scalable process for the preparation of asymmetric CHFMs by direct pyrolysis of polymeric precurso...