ALEXANDRIA, Va., June 10 -- United States Patent no. 12,290,491, issued on May 6, was assigned to Becton Dickinson and Co. Ltd. (Dun Laoghaire, Ireland).

"Closed system stress resistant membrane" was invented by Paul Paia Marici (Piscataway, N.J.), Shawn Ray Isaacson (Layton, Utah), Andrew C. Farinella (Oradell, N.J.) and Mitchell Evan Gatesman (Morrisville, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A membrane for use in connection with a closed system transfer device has a body with a proximal portion opposite a distal portion along a central axis and a skirt extending radially outward from the distal end such that a lip is formed at a transition between the proximal portion and the distal portion...