ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,444,594, issued on Oct. 14, was assigned to Thermo Fisher Scientific (Bremen) GmbH (Bremen, Germany).
"Gas valves for ion guides" was invented by Henning Wehrs (Bremen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ion optical arrangement (1) for use in a mass spectrometer comprises electrodes (11) defining an ion optical path, a housing (18) for accommodating the electrodes, a voltage source for providing voltages to the electrodes to produce electric fields, and a valve for allowing gas to enter and/or leave the housing. The valve comprises an electrostatic mechanism and/or a pneumatic mechanism. The electrostatic mechanism may comprise a ...