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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
5703358 Method for generating filtered noise signal and braodband signal having reduced dynamic range for use in mass spectrometry Dec. 30, 1997
5696376 Method and apparatus for isolating ions in an ion trap with increased resolving power Dec. 9, 1997
5693941 Asymmetric ion trap Dec. 2, 1997
5679951 Mass spectrometry method with two applied trapping fields having same spatial form Oct. 21, 1997
5679950 Ion trapping mass spectrometry method and apparatus therefor Oct. 21, 1997
5672870 Mass selective notch filter with quadrupole excision fields Sep. 30, 1997
5672868 Mass spectrometer system and method for transporting and analyzing ions Sep. 30, 1997
5654542 Method for exciting the oscillations of ions in ion traps with frequency mixtures Aug. 5, 1997
5650617 Method for trapping ions into ion traps and ion trap mass spectrometer system thereof Jul. 22, 1997
5644131 Hyperbolic ion trap and associated methods of manufacture Jul. 1, 1997
5640011 Method of detecting selected ion species in a quadrupole ion trap Jun. 17, 1997
5633497 Surface coating to improve performance of ion trap mass spectrometers May. 27, 1997
5629519 Three dimensional quadrupole ion trap May. 13, 1997
5625186 Non-destructive ion trap mass spectrometer and method Apr. 29, 1997
5623144 Mass spectrometer ring-shaped electrode having high ion selection efficiency and mass spectrometry method thereby Apr. 22, 1997
5616919 Universal quadrupole and method of manufacture Apr. 1, 1997
5610397 Mass spectrometry method using supplemental AC voltage signals Mar. 11, 1997
5608216 Frequency modulated selected ion species isolation in a quadrupole ion trap Mar. 4, 1997
5598001 Mass selective multinotch filter with orthogonal excision fields Jan. 28, 1997
5596193 Miniature quadrupole mass spectrometer array Jan. 21, 1997
5576540 Mass spectrometer with radial ejection Nov. 19, 1996
5572025 Method and apparatus for scanning an ion trap mass spectrometer in the resonance ejection mode Nov. 5, 1996
5572035 Method and device for the reflection of charged particles on surfaces Nov. 5, 1996
5572022 Method and apparatus of increasing dynamic range and sensitivity of a mass spectrometer Nov. 5, 1996
5569917 Apparatus for and method of forming a parallel ion beam Oct. 29, 1996
5561291 Mass spectrometry method with two applied quadrupole fields Oct. 1, 1996
5559327 Ion filter and mass spectrometer using arcuate hyperbolic quadrapoles Sep. 24, 1996
5559325 Method of automatically controlling the space charge in ion traps Sep. 24, 1996
5541409 High resolution retarding potential analyzer Jul. 30, 1996
5532140 Method and apparatus for suspending microparticles Jul. 2, 1996
5525084 Universal quadrupole and method of manufacture Jun. 11, 1996
5521382 MS/MS type mass analyzer May. 28, 1996
5521379 Method of selecting reaction paths in ion traps May. 28, 1996
5521380 Frequency modulated selected ion species isolation in a quadrupole ion trap May. 28, 1996
5517025 Frequency modulated selected ion species isolation in a quadrupole ion trap May. 14, 1996
5508516 Mass spectrometry method using supplemental AC voltage signals Apr. 16, 1996
5479012 Method of space charge control in an ion trap mass spectrometer Dec. 26, 1995
5471058 Anesthesia monitor Nov. 28, 1995
5468957 Ejection of ions from ion traps by combined electrical dipole and quadrupole fields Nov. 21, 1995
5468958 Quadrupole ion trap with switchable multipole fractions Nov. 21, 1995
5469323 Method and apparatus for trapping charged particles Nov. 21, 1995
5466931 Mass spectrometry method using notch filter Nov. 14, 1995
5466931 Mass spectrometry method using notch filter Nov. 14, 1995
5464975 Method and apparatus for charged particle collection, conversion, fragmentation or detection Nov. 7, 1995
5459315 Quadrupole mass analyzer including spring-clamped heat sink plates Oct. 17, 1995
5457315 Method of selective ion trapping for quadrupole ion trap mass spectrometers Oct. 10, 1995
5451782 Mass spectometry method with applied signal having off-resonance frequency Sep. 19, 1995
5449905 Method for generating filtered noise signal and broadband signal having reduced dynamic range for use in mass spectrometry Sep. 12, 1995
5448061 Method of space charge control for improved ion isolation in an ion trap mass spectrometer by dynamically adaptive sampling Sep. 5, 1995
5438195 Method and device for the digital generation of an additional alternating voltage for the resonant excitation of ions in ion traps Aug. 1, 1995

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