ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,540, issued on May 13, was assigned to ASM IP Holding B.V. (Almere, Netherlands).
"Chemical source vessel with dip tube" was invented by Andrew Michael Yednak III (Phoenix) and Todd Robert Dunn (Cave Creek, Ariz.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A chemical vessel is disclosed comprising a dip tube and a level sensor tube arranged in an elongated counterbore incorporated into a housing of the chemical vessel. The chemical vessel may be configured to allow a pushback routine to take place, whereby a level of liquid in the chemical vessel is reduced to a point that the dip tube is free from liquid inside the dip tube or at the bottom of t...