Patents
Patents for G01N 30 - Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography (41,194)
01/1978
01/03/1978US4066879 Means and method for controlling eluent gradient in liquid chromatography
01/03/1978US4066411 N-nitroso compound analyzer with sample atomization
01/03/1978US4066409 Oxidizing organic nitrogen compounds
01/03/1978US4066406 Process and apparatus for the voltammetric measurement of the quantity or mass of separated sample components
01/03/1978US4066402 Thermal conductivity gas chromatograph of nitrogen and carbon dioxide products
01/03/1978US4066183 Chromatographic septum having polyimide coating
12/1977
12/27/1977US4065384 Graft thin layer chromatography
12/27/1977US4064908 Combination needle flow control and shut-off valve for precision instruments
12/20/1977US4064512 Data recording apparatus
12/20/1977US4064041 Silica gel, particle sizes
12/13/1977US4063156 Assymetric cylinder electron capture detector
12/13/1977US4063077 Solvent programmer controller
12/13/1977US4062240 Dosing device for a liquid chromatograph
12/06/1977US4061828 Modified, grafted mineral carriers
11/1977
11/29/1977US4060517 Continuous manufacture of polyamides
11/29/1977US4059994 Pneumatic chromatograph
11/22/1977US4059523 Column for use in high speed liquid chromatography
11/22/1977US4059406 Electrochemical detector system
11/22/1977US4059009 Liquid chromatography system
11/15/1977US4058460 Horizontal flow-through coil planet centrifuge without rotating seals
11/15/1977US4057998 Chromatograph, more particularly for gas phase chromatography
11/15/1977US4057997 Sample preparation
11/01/1977US4056468 Isolation of component materials of aqueous solutions soluble in lipophilic solvents
11/01/1977US4055987 Liquid chromatograph/mass spectrometer interface
10/1977
10/25/1977USRE29454 Method for producing a gradient elution
10/25/1977US4055493 Method for opening a high-density packed column in liquid chromatography
10/25/1977US4055072 Apparatus for measuring a sorbate dispersed in a fluid stream
10/18/1977US4054432 Ethoxycarbonyl substituted polyphenylene resin
10/18/1977US4054414 Gas chromatographic method for the multi-elemental microanalysis of organic materials
10/18/1977US4054384 Sample-background-signal autocancellation in fluid-sample analyzers, using symmetrical time-delay or time-averaging
09/1977
09/27/1977US4051025 Preparative countercurrent chromatography with a slowly rotating helical tube array
09/27/1977US4050911 Gas chromatograph oven
09/13/1977US4048499 Infrared absorption spectroscopy of liquids employing a thermal detector
09/13/1977US4048416 Thiopolymers, their derivatives and methods for their preparation and use
09/13/1977US4047892 Cyclohexane
09/06/1977US4046634 Assay of isoenzymes by ion exchange chromatography
09/06/1977US4045998 Temperature control system
08/1977
08/30/1977US4045353 High-energy radiation induced polymerization on a chromatographic solid support
08/30/1977US4045343 High pressure liquid chromatography system
08/30/1977US4044593 Chromatograph
08/23/1977US4044257 Retention time chromatograph employing an IR absorption spectrographic detector
08/23/1977US4043906 Method and apparatus for reducing the transient effects of liquid compressibility in a liquid chromatography system
08/23/1977US4043202 Sample injection system for analyzers
08/16/1977US4042885 Zeroing circuit
08/16/1977US4042499 Liquid adsorption chromatographic apparatus and method
08/16/1977US4042350 Methods and applications of preparative scale chromatography
08/16/1977US4042327 Liquid chromatography, reversible complexes
08/16/1977US4042326 Or bis-chloromethyl ether with improved sensitivity
08/09/1977US4040805 Personal monitoring device, or dosimeter, for measuring exposure of personnel to organic vapors
08/02/1977US4039652 Antigens, antibodies
08/02/1977US4038874 Device for the insertion of samples into a chromatography column
07/1977
07/26/1977US4038055 Gas chromatograph for continuous operation with infrared spectrometer
07/26/1977US4038053 Method and apparatus for introducing liquid samples into a gas chromatographic column
07/19/1977US4036704 Liquid chromatographical method
07/19/1977US4036063 Sample dilution
07/19/1977US4036062 Sample dilution
07/12/1977US4035168 Glass beads, glass wool
07/12/1977US4035086 Multi-channel analyzer for liquid chromatographic separations
07/05/1977US4033720 Detection
07/05/1977US4033171 Pneumatic detector for chromatographic analyzer
06/1977
06/28/1977US4032445 Liquid chromatography pumping system with compensation means for liquid compressibility
06/28/1977US4032296 Electrolytic conductivity detector system
06/21/1977US4031201 Fibres incorporating antibodies, antigens and antisera, method for their preparation and their use
06/21/1977US4030887 Catalysts
06/21/1977US4030369 Automatic control system for vacuum loop sample injection system
06/14/1977US4029416 Sample-background-signal autocancellation in fluid-sample analyzers
06/07/1977US4028617 Ionization detector utilizing electric discharge
06/07/1977US4027983 Novel gasket and flow cell comprising same
05/1977
05/31/1977US4027163 Method of compensating for quenching effect of substance contained in a sample gas the radioactivity of which is to be measured by a radioactivity detector and apparatus for performing the same
05/31/1977US4026803 Chromatographic column with improved end fittings
05/24/1977US4024752 Method and apparatus for simple field test to determine final boiling point of a volatile liquid sample
05/17/1977US4024061 Pulse dampers for liquid chromatography
05/10/1977USRE29209 Method and apparatus for continuously sensing the condition of a gas stream
05/10/1977US4022065 Calibrated sample delivery apparatus accommodating offset error
04/1977
04/26/1977US4019372 Chromatographic detector system
04/19/1977US4018685 Automatic liquid mixing device
04/12/1977US4017528 Preparation of organically modified silicon dioxides
04/12/1977US4017262 Chromatographic apparatus for analysis of ionic species
04/05/1977US4016074 Chromatographic separation
04/05/1977US4015939 Competitive binding thyroid assay with improved bound-free separation step
03/1977
03/29/1977US4014798 Insoluble polyelectrolyte and ion-exchange hollow fiber impregnated therewith
03/29/1977US4014793 Detecting apparatus for liquid chromatography
03/29/1977US4014711 Separation of fructose from a mixture of sugars
03/22/1977US4013913 Ion detection electrode arrangement
03/22/1977US4013364 Baseline correction in densitometrical measurements
03/08/1977US4011451 Novel photometric system
02/1977
02/15/1977US4007626 Vaporizing volatile components of a liquid sample, backflushing
02/08/1977US4006990 Convergent light illuminated flow cell for liquid chromatography
02/08/1977US4006624 Pneumatic chromatograph
02/01/1977US4006350 Method for performing a separating analysis
02/01/1977US4006069 Polymeric flat plate and gel enclosed in the open cells
01/1977
01/25/1977US4005187 Diagnostic test method
01/25/1977US4005137 Adsorption on silica gel
01/25/1977US4004884 Time division metering system
01/25/1977US4004881 Apparatus for generating carrier gas-test specimen vapor mixtures for delivery into a gas chromatograph
01/25/1977US4004548 Chromatographic spotter
01/18/1977US4003679 High pressure pump with metering
01/18/1977US4003257 Gas chromatography by adsorption on 2,6-diphenyl-para-phenylene oxide porous polymer
01/18/1977US4003243 Method of analysis by liquid-phase chromatography
01/11/1977US4002070 Sample injection system