US Patent Issued to SHIMADZU on May 20 for "Mass spectrometer" (Japanese Inventor)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,223, issued on May 20, was assigned to SHIMADZU Corp. (Kyoto, Japan).

"Mass spectrometer" was invented by Kohei Hosoo (Kyoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A mass spectrometer includes: a first ion guide disposed in a first intermediate vacuum chamber; a first partition wall portion which constitutes at least a part of a partition wall separating the first intermediate vacuum chamber and a second intermediate vacuum chamber and has an ion passage hole; a second ion guide disposed in a second intermediate vacuum chamber; a second partition wall portion which constitutes at least a part of a partition wall which is a subsequent ...