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Class Information
Number: 250/292
Name: Radiant energy > Ionic separation or analysis > Cyclically varying ion selecting field means > Laterally resonant ion path
Description: Subject matter wherein the selecting means comprises field means causing alternating deflection of the ions normal to their general forward motion.










Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Patent Number Title Of Patent Date Issued
5170054 Mass spectrometric high-frequency quadrupole cage with overlaid multipole fields Dec. 8, 1992
5164593 Mass spectrometer system including an ion source operable under high pressure conditions, and a two-stage pumping arrangement Nov. 17, 1992
5153432 Ion source for quadrupole mass spectrometer Oct. 6, 1992
5134286 Mass spectrometry method using notch filter Jul. 28, 1992
RE34000 Method of operating ion trap detector in MS/MS mode Jul. 21, 1992
5132536 Gauge head for a quadrupole mass spectrometer Jul. 21, 1992
5127931 Process for ion exchange on glass or glass ceramic Jul. 7, 1992
5128542 Method of operating an ion trap mass spectrometer to determine the resonant frequency of trapped ions Jul. 7, 1992
5120957 Apparatus and method for the control and/or analysis of charged particles Jun. 9, 1992
5120958 Ion storage device Jun. 9, 1992
5107109 Method of increasing the dynamic range and sensitivity of a quadrupole ion trap mass spectrometer Apr. 21, 1992
5105081 Mass spectrometry method and apparatus employing in-trap ion detection Apr. 14, 1992
5089703 Method and apparatus for mass analysis in a multipole mass spectrometer Feb. 18, 1992
5083021 Mass spectrometer with quadrupole filter and movable carrier providing access to the ion source Jan. 21, 1992
5077472 Ion mirror for a time-of-flight mass spectrometer Dec. 31, 1991
5075547 Quadrupole ion trap mass spectrometer having two pulsed axial excitation input frequencies and method of parent and neutral loss scanning and selected reaction monitoring Dec. 24, 1991
5055678 Metal surfaces for sample analyzing and ionizing apparatus Oct. 8, 1991
5051593 Electrostatic multipole lens for charged-particle beam Sep. 24, 1991
5047636 Linear prediction ion cyclotron resonance spectrometry apparatus and method Sep. 10, 1991
5028777 Method for mass-spectroscopic examination of a gas mixture and mass spectrometer intended for carrying out this method Jul. 2, 1991
5026987 Mass spectrometer with in-line collision surface means Jun. 25, 1991
4990777 Rod assembly for multipole mass spectrometers Feb. 5, 1991
4985626 Quadrupole mass filter for charged particles Jan. 15, 1991
4963736 Mass spectrometer and method and improved ion transmission Oct. 16, 1990
4945234 Method and apparatus for producing an arbitrary excitation spectrum for Fourier transform mass spectrometry Jul. 31, 1990
4931640 Mass spectrometer with reduced static electric field Jun. 5, 1990
4885500 Quartz quadrupole for mass filter Dec. 5, 1989
4882484 Method of mass analyzing a sample by use of a quistor Nov. 21, 1989
4870283 Electric multipole lens Sep. 26, 1989
4818869 Method of isolating a single mass or narrow range of masses and/or enhancing the sensitivity of an ion trap mass spectrometer Apr. 4, 1989
4818864 Method for eliminating undesirable charged particles from the measuring cell of an ICR spectrometer Apr. 4, 1989
4816685 Ion volume ring Mar. 28, 1989
4816675 Quadrupole mass filter with unbalanced R.F. voltage Mar. 28, 1989
4814613 Collision cell for triple quadrupole tandem mass spectrometry Mar. 21, 1989
4785173 Element analyzing apparatus Nov. 15, 1988
4771172 Method of increasing the dynamic range and sensitivity of a quadrupole ion trap mass spectrometer operating in the chemical ionization mode Sep. 13, 1988
4769542 Charged particle energy analyzer Sep. 6, 1988
4766312 Methods and apparatus for detecting negative ions from a mass spectrometer Aug. 23, 1988
4755670 Fourtier transform quadrupole mass spectrometer and method Jul. 5, 1988
4749860 Method of isolating a single mass in a quadrupole ion trap Jun. 7, 1988
4736101 Method of operating ion trap detector in MS/MS mode Apr. 5, 1988
4731533 Method and apparatus for dissociating ions by electron impact Mar. 15, 1988
4721854 Quadrupole mass spectrometer Jan. 26, 1988
4709148 Quadrupole mass spectrometers Nov. 24, 1987
4704532 Methods and structures to produce electrostatic quadrupole fields using closed boundaries Nov. 3, 1987
4703190 Power supply system for a quadrupole mass spectrometer Oct. 27, 1987
4700069 Mass spectrometer of a quadrupole electrode type comprising a divided electrode Oct. 13, 1987
4695724 AC-modulation quadrupole mass spectrometer Sep. 22, 1987
4694169 Mass spectrometer Sep. 15, 1987
4652753 Mass spectrometer capable of analyzing an insulator Mar. 24, 1987

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