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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:
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Patent Number Title Of Patent Date Issued
5436445 Mass spectrometry method with two applied trapping fields having same spatial form Jul. 25, 1995
5422482 Mass spectrometric apparatus Jun. 6, 1995
5420424 Ion mobility spectrometer May. 30, 1995
5420425 Ion trap mass spectrometer system and method May. 30, 1995
5412207 Method and apparatus for analyzing a gas sample May. 2, 1995
5401962 Residual gas sensor utilizing a miniature quadrupole array Mar. 28, 1995
5399857 Method and apparatus for trapping ions by increasing trapping voltage during ion introduction Mar. 21, 1995
5397894 Method of high mass resolution scanning of an ion trap mass spectrometer Mar. 14, 1995
5396064 Quadrupole trap ion isolation method Mar. 7, 1995
5389785 ION filter apparatus and method of production thereof Feb. 14, 1995
5386113 Method and device for in-phase measuring of ions from ion trap mass spectrometers Jan. 31, 1995
5384461 Process for the manufacture of a multipolar elongate-electrode lens or mass filter Jan. 24, 1995
5381007 Mass spectrometry method with two applied trapping fields having same spatial form Jan. 10, 1995
5381006 Methods of using ion trap mass spectrometers Jan. 10, 1995
5378891 Method for selective collisional dissociation using border effect excitation with prior cooling time control Jan. 3, 1995
5373157 Quadrupole electrode and process for producing the same Dec. 13, 1994
5354988 Power supply for multipolar mass filter Oct. 11, 1994
5352890 Quadrupole ion trap mass spectrometer having two axial modulation excitation input frequencies and method of parent and neural loss scanning Oct. 4, 1994
5352892 Atmospheric pressure ion interface for a mass analyzer Oct. 4, 1994
5347127 Method and device for in-phase excitation of ion ejection from ion trap mass spectrometers Sep. 13, 1994
5345078 Mass spectrometry method using notch filter Sep. 6, 1994
5331157 Method of clean removal of ions Jul. 19, 1994
5324939 Method and apparatus for ejecting unwanted ions in an ion trap mass spectrometer Jun. 28, 1994
5315120 Univane RFQ May. 24, 1994
5302826 Quadrupole trap improved technique for collisional induced disassociation for MS/MS processes Apr. 12, 1994
5302827 Quadrupole mass spectrometer Apr. 12, 1994
5300772 Quadruple ion trap method having improved sensitivity Apr. 5, 1994
5298746 Method and device for control of the excitation voltage for ion ejection from ion trap mass spectrometers Mar. 29, 1994
5298745 Multilayer multipole Mar. 29, 1994
5291017 Ion trap mass spectrometer method and apparatus for improved sensitivity Mar. 1, 1994
5291016 Electrostatic lens arrangement of multi-stages of multi-pole electrodes and mass spectrometer using the same Mar. 1, 1994
5285063 Method of detecting ions in an ion trap mass spectrometer Feb. 8, 1994
5283436 Generation of an exact three-dimensional quadrupole electric field and superposition of a homogeneous electric field in trapping-exciting mass spectrometer (TEMS) Feb. 1, 1994
5274233 Mass spectrometry method using supplemental AC voltage signals Dec. 28, 1993
5268572 Differentially pumped ion trap mass spectrometer Dec. 7, 1993
5256875 Method for generating filtered noise signal and broadband signal having reduced dynamic range for use in mass spectrometry Oct. 26, 1993
5248883 Ion traps of mono- or multi-planar geometry and planar ion trap devices Sep. 28, 1993
5227629 Quadrupole mass spectrometer Jul. 13, 1993
5206509 Universal collisional activation ion trap mass spectrometry Apr. 27, 1993
5206507 Mass spectrometry method using filtered noise signal Apr. 27, 1993
5200613 Mass spectrometry method using supplemental AC voltage signals Apr. 6, 1993
5198665 Quadrupole trap improved technique for ion isolation Mar. 30, 1993
5196699 Chemical ionization mass spectrometry method using notch filter Mar. 23, 1993
5187365 Mass spectrometry method using time-varying filtered noise Feb. 16, 1993
5182451 Method of operating an ion trap mass spectrometer in a high resolution mode Jan. 26, 1993
5180914 Mass spectrometry systems Jan. 19, 1993
5179278 Multipole inlet system for ion traps Jan. 12, 1993
5177359 Quadrupole mass spectrometer having plural stable regions Jan. 5, 1993
5173604 Mass spectrometry method with non-consecutive mass order scan Dec. 22, 1992
5171991 Quadrupole ion trap mass spectrometer having two axial modulation excitation input frequencies and method of parent and neutral loss scanning Dec. 15, 1992

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