ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,446,501, issued on Oct. 21, was assigned to Sierra Space Corp. (Louisville, Colo.).

"Plant growth system for microgravity environments" was invented by Dan Wyman (Madison, Wis.), Samuel A. Moffatt (Madison, Wis.), Michael Peterson (Bondurant, Iowa) and John P. Wetzel (Verona, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A plant growth system for a microgravity environment includes a root chamber configured to prevent liquid from escaping from the root chamber in the microgravity environment and to enable recovery of liquid from within the root chamber. In some embodiments, the root chamber may be configured to provide water and/or nutrients to th...