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| Number | Title | Issue Date |
| 4026803 | Chromatographic column with improved end fittings Novel end fitting assemblies of particular advantage for use on liquid chromatographic columns, and novel chromatographic columns comprising these novel end fittings. The end-fittings are characterized by (a) very low dead space; (b) economical and conven... | 05/31/1977 |
| 4024061 | Pulse dampers for liquid chromatography In a liquid chromatograph apparatus, a pulse damper consists of a block of solid material almost filling the cavity of the damper, for example a polytetrafluoroethylene block occupying 99% of the volume of the cavity but arranged to move freely therein.... | 05/17/1977 |
| 4019372 | Chromatographic detector system The present invention is a liquid chromatograph comprising a chromatographic column; means, including a pump, connected to the input of the column for injecting a sample under pressure into the column; and a detector system, including an optically transpa... | 04/26/1977 |
| 4018685 | Automatic liquid mixing device A device for mixing a plurality of liquid components in preselected proportions to form a mixture of the liquid components. The device includes a separate liquid component storage reservoir for each liquid component, a pump, means to successively connect ... | 04/19/1977 |
| 4016074 | Chromatographic separation In the liquid chromatographic analysis of a sample containing two or more constituents which are chromatograhically separable using an aqueous ether carrier liquid, an effective amount of water is added to the chromatographic carrier liquid thereby increa... | 04/05/1977 |
| 4014793 | Detecting apparatus for liquid chromatography An improved detection apparatus employable in liquid chromatography for analyzing a selected non-volatile phase of a liquid effluent is described. A vibrating capillary tube is coupled to the effluent source for atomizing the effluent. The atomizer commun... | 03/29/1977 |
| 4003243 | Method of analysis by liquid-phase chromatography This invention concerns a method of analysis by liquid-phase chromatography with programmed elution gradient. According to this method, two chromatography columns, of at least approximately similar porous volume and permeability, are each fed with a mixtu... | 01/18/1977 |
| 4000098 | Separation of proteins by hydrophobic adsorption Separation of proteins from one another by passing an aqueous solution of a mixture of proteins through two or more bodies of matrices each having hydrophobic ligands covalently attached to it, the order of hydrophobicity being such that the protein mixtu... | 12/28/1976 |
| 4000070 | Apparatus for protecting a liquid chromatography column An improved apparatus for protection of a liquid chromatography column is proposed. Under environmental changes in pressure and temperature, a liquid and a gas in a non-expandable container communicated with the chromatography column change their relative... | 12/28/1976 |
| 3997298 | Liquid chromatography-mass spectrometry system and method Liquid chromatography-mass spectrometer apparatus and method are disclosed for analyzing the components of a complex mixture, characterized in that at least a portion of the eluted effluent from the liquid column is continuously introduced directly into t... | 12/14/1976 |
| 3994805 | Angle rotor countercurrent chromatography An apparatus for performing countercurrent chromatography comprises a rotor which holds a coiled helix column at 30° from the vertical. Versatility of the angle rotor is demonstrated on high efficiency separations of biological compounds using a variety ... | 11/30/1976 |
| 3987058 | Preparation and uses of stable, bound stationary phases Sulfobenzylsilicas in which the organic moiety is bound to silica surfaces through a carbon-silicon bond are prepared by treating silica with thionyl chloride to chlorinate reactive silanol groups, reacting the product with benzyllithium and sulfonating t... | 10/19/1976 |
| 3985019 | Liquid chromatography system with solvent proportioning A liquid chromatography system including a liquid chromatography column, first and second reservoirs for solvents to be utilized as the mobile phase, reciprocating pumping means for flowing the solvents through the column, and motor means for driving the ... | 10/12/1976 |
| 3985021 | High performance liquid chromatography system A liquid chromatography system, including a reservoir for a liquid mobile phase, a liquid chromatography column, reciprocating pumping means for pumping the mobile phase through the column, and motor means for driving the pumping means through successive ... | 10/12/1976 |
| 3984315 | Electromagnetic metering pump Apparatus for pumping the eluent liquid through a chromatograph column is provided in the form of an electromagnetic metering pump, the outlet of which is provided with a pulsation damping device in the form of a sealed chamber having a resiliently loaded... | 10/05/1976 |
| 3983299 | Bonded carbohydrate stationary phases for chromatography A carbohydrate bonded support for use in a chromatographic system, and a method for preparation of such a support is disclosed herein. An inorganic support has a thin layer of carbohydrate or carbohydrate derivative covalently linked to the surface so tha... | 09/28/1976 |
| 3981801 | Gradient storage method for liquid chromatography A method of preparing samples of a liquid the composition of which varies from one region to another within a given volume, for subsequent storage or use, in which a first liquid is introduced into a long narrow tube which has particular dimensions and wh... | 09/21/1976 |
| 3981179 | Fluid detecting system A system and method wherein a sample fluid in a reference carrier fluid stream is passed through a sample cell to a point of dilution and then through a reference cell, and a detector means indicates a characteristic of the sample fluid by simultaneously ... | 09/21/1976 |
| 3978575 | Method and device for extracting filter frits from liquid chromatographic columns A method and apparatus for removing a small metal filter from a liquid chromatographic column, wherein a retaining member is clamped around the tube. A first centering device is releasably centered on the retaining member in alignment with the filter, whe... | 09/07/1976 |
| 3970561 | Separation of compounds differing in isotopic composition Compounds differing in isotopic composition are separated by introducing a mixture of the compounds into a chromatographic column containing a lanthanide chelate as a stationary phase and eluting from the column a fraction which is at least enriched with ... | 07/20/1976 |
| 3966609 | Chromatographic device A chromatographic device in the form of a tube, adapted to contain a bed of particulate adsorbent material, the tube being provided with a removable, gas and liquid permeable, lid at one end and at the other end with a sliding element permeable to liquids... | 06/29/1976 |
| 3966596 | High performance, cation-exchange chromatography on surface-sulfonated compositions A process for high performance, cation-exchange chromatography employing a cation-exchange composition comprising synthetic resin particles of about 5 to about 200 microns particle size, said synthetic resin particles being cross-linked to from about 0.25... | 06/29/1976 |
| 3966410 | Group extraction of organic compounds present in liquid samples An extraction device is disclosed comprising a tube containing a substantially inert, chemically non-reactive packing material with a large surface area to volume ratio. A sample which consists of organic compounds dissolved in a liquid, is introduced int... | 06/29/1976 |
| 3963614 | Apparatus for removing unnecessary components from samples A sample is sucked from a probe into a column filled with a porous material and successively thereafter an auxiliary liquid is sucked from the probe and passed through the column, whereby unnecessary components in the sample are moved through the column a... | 06/15/1976 |
| 3960720 | Gel product for separation purposes and method of using the product for hydrophobic salting out adsorption The invention concerns a gel product for chromatography based on agarose, and a method of using the product for hydrophobe salting out adsorption. The gel product is characterized in that the hydrophobe groups are bonded to the agarose with ether or esthe... | 06/01/1976 |
| 3954678 | Semipermeable microcapsules containing a silica gel Described are semipermeable microcapsules which comprise an outer semipermeable polymeric skin encapsulating a silica gel. These microcapsules may be used as chromatographic media or may be modified to contain a homogeneous or heterogeneous catalyst and/o... | 05/04/1976 |
| 3954617 | Apparatus for liquid chromatography having automatic sampling system Apparatus for liquid chromatography having an automatic sampling system including an intermittently rotatable circular table having a number of sample cups on its peripheral portion, a wash liquor receptacle disposed close to the circular table, a withdra... | 05/04/1976 |
| 3954616 | Chromatographic apparatus A chromatograph column and detector in separately controlled ovens spaced by an air gap are connected by a conduit that has a thermally conductive sheath, at least in the region of the air gap, which sheath is thermally attached to the detector oven to su... | 05/04/1976 |
| 3954608 | Method and device for rapid chromatographic separation A method of rapid chromatographic separation by exchange of substances between two fluid phases circulating in coutercurrent flow, at least one phase being liquid, consists in injecting the substances to be separated into one of the phases, in causing the... | 05/04/1976 |
| 3949806 | Method and apparatus for refluxation in microliter scale Refluxation of liquids in microliter quantities of as little as 5 μl are performed in an apparatus consisting of a holder which holds the microvessels such that the lower part thereof is immersed in a heating bath, while the holder is being continuously ... | 04/13/1976 |
| 3936374 | Variable jet separator A variable jet separator apparatus is described which is useful for separating mixtures of gases and mixtures of liquid having different molecular-weight components in them.... | 02/03/1976 |
| 3934456 | Solvent gradient generator for chromatography systems Solvent gradient generating apparatus in a liquid column chromatography system. A multi-compartment vessel having an input/output port pair for each compartment is coupled between a high pressure pump and the column cell for providing both gradient genera... | 01/27/1976 |
| 3935299 | Process for preparation of wide-pore adsorbent for use in chromatography A process for preparing a wide-pore adsorbent adapted for use in chromatography, comprising mixing fine disperse non-porous silica having a specific surface area S of 35 to 380 m2 /g with water followed by drying the aqueous suspension at a tem... | 01/27/1976 |
