| Patent Number |
Title Of Patent |
Date Issued |
| D379585 |
Container |
June 3, 1997 |
|
| 6790674 |
Sampler |
September 14, 2004 |
| To sample hot liquids containing volatile materials, the liquid is cooled in a refrigerator and pumped through a syringe needle into a container until the container overflows. The needle is removed slowly and the container is automatically closed as the needle is withdrawn, wherein l |
| 6755074 |
Liquid chromatographic method and system |
June 29, 2004 |
| To economically perform preparatory chromatography, a plurality of pumps each having a corresponding one of a plurality of pistons and a corresponding one of a plurality of cylinders are driven by one motor to draw and pump solvent simultaneously into corresponding columns. To form a |
| 6749749 |
Separation system, components of a separation system and methods of making and using them |
June 15, 2004 |
| Permeable polymeric monolithic materials are prepared in a column casing. In one embodiment, the permeable polymeric monolithic materials are polymerized while pressure is applied through a piston having a smooth piston head in contact with the polymerization mixture. The pressure el |
| 6565745 |
Disposable chromatographic columns |
May 20, 2003 |
| To make an inexpensive chromatographic column and perform chromatography with it, column walls and a column end with an inlet port are molded integrally from plastic and a snap-on end is molded integrally with an outlet port from plastic. A filter is placed in one end of the column and |
| 6494331 |
Sampler |
December 17, 2002 |
| To sample liquids containing volatile materials, the liquid is pumped through a syringe needle into a container until the container overflows. The needle is removed slowly and the container is automatically closed as the needle is withdrawn, wherein liquid flows upwardly continuously as |
| 6427526 |
Liquid chromatographic method and system |
August 6, 2002 |
| To economically perform preparatory chromatography, a plurality of pumps each having a corresponding one of a plurality of pistons and a corresponding one of a plurality of cylinders are driven by one motor to draw and pump solvent simultaneously into corresponding columns. To form a |
| 6354345 |
Pumping system |
March 12, 2002 |
| To pump fluid into sample containers, a distributor arm of a sample collector is calibrated as to position in a computer memory and is moved from position to position over different containers while a counter in computer memory keeps track of its position. When the distributor arm is |
| 6319410 |
Apparatus and method for super critical fluid extraction |
November 20, 2001 |
| To provide performance particularly in handling supercritical extraction systems, a specially designed pump includes a cam-driven, single-plunger with a cam having a profile that enables the pumping system to avoid destructive reverse torque on the cam, gear train and drive motor after |
| 6296769 |
Multi-chambered supercritical fluid extraction cartridge and processes using it |
October 2, 2001 |
| A multiple chamber sample holding cartridge is used with a supercritical fluid extractor that causes membranes dividing the cartridge into chambers to rupture upon the pressurization of the sample cartridge, thereby allowing the intermixing of materials contained in the chambers. The |
| 6294088 |
Apparatus and method for supercritical fluid extraction or supercritical fluid chromatography |
September 25, 2001 |
| A variable-orifice fluid restrictor for use with a supercritical extractor or chromatograph includes an inlet line for fluid at a pressure above its critical pressure, an extended tubular probe having an inner and an outer surface and a proximal and a distal end. The proximal end of the |
| 6263747 |
Remote installation method and tool |
July 24, 2001 |
| To insert an instrument into a flow stream of a sewer pipe from the street, the instrument is fastened to a holder, which in turn is fastened to a portion of an expansion ring opposite its two opened edges. A cord is fastened to one of the edges of the expansion ring and passes over a |
| 6251267 |
Apparatus for supercritical fluid extraction |
June 26, 2001 |
| An apparatus for supercritical extraction is disclosed herein. The apparatus includes a plurality of containers adapted to hold a different one of a corresponding plurality of samples, a first transport means for carrying the plurality of sample containers, and a second transport means |
| 6241890 |
Apparatus and method for supercritical fluid extraction |
June 5, 2001 |
| To collect analyte from a supercritical fluid extractor, the collector lifts vials into place by a biasing means that guides the file up to the restrictor where it is sealed. The vial can be moved back down from the collecting mechanism even if frost forms on the vial while the restricto |
| 6197256 |
Device for analyzing fluid samples |
March 6, 2001 |
| An analyzing system for analyzing fluid samples includes a measuring buoy immersible in a body of fluid to be tested. The buoy forms a sample chamber in which samples of the fluid are to be tested. The sample chamber communicates with a settling chamber through a chamber opening, and the |
| 6178831 |
Composite wastewater sampler |
January 30, 2001 |
| A composite wastewater sampler includes a flow-through-chamber having an inlet port and an outlet port with a path between them that gradually increases in depth and width and then decreases in width. It is shaped to cause fluid to: (1) flow from the inlet port; (2) drop to a lower level |
| 6152189 |
Sampler |
November 28, 2000 |
| To sample liquids containing volatile materials, the liquid is pumped through a syringe needle into a container until the container overflows. The needle is removed slowly and the container is automatically closed as the needle is withdrawn, wherein liquid flows upwardly continuously as |
| 6149814 |
Apparatus and method for supercritical fluid extraction or supercritical fluid chromatography |
November 21, 2000 |
| A variable-orifice fluid restrictor for use with a supercritical extractor or chromatograph includes an inlet line for fluid at a pressure above its critical pressure, an extended tubular probe having an inner and an outer surface and a proximal and a distal end. The proximal end of the |
| 6123904 |
Water impurity analyzer |
September 26, 2000 |
| To determine the total organic carbon content of a flowing liquid in a continuous process, water and oxidizing agents enter lower ports in a multi-stage column and flow upwardly through residence chambers as they are mixed. Spaced apart along the upper path of the liquid, there are h |
| 6114172 |
Process and device for determining the biological oxygen demand of sewage |
September 5, 2000 |
| In order to determine the biological oxygen demand of sewage, a sample of sewage is taken into a reaction vessel in which there is a biological bath which is kept moving turbulently by an agitator. An oxygen probe measure the oxygen consumption per unit time. After each measuring cycle t |
| 6086767 |
Apparatus and method for supercritical fluid extraction or supercritical fluid chromatography |
July 11, 2000 |
| An automatic variable-orifice fluid restrictor for use with a supercritical extractor having a collection trap or a supercritical chromatograph includes an inlet line for fluid at a pressure above its critical pressure, an extended tubular probe having an inner and an outer surface a |
| 6083399 |
Apparatus and method for supercritical fluid extraction |
July 4, 2000 |
| To avoid deposits on the restrictor that channels extractant into a collector, a heated capillary tube pressure release restrictor, has a thermally insulated outlet end in a collecting trap substantially colder than the capillary tube. The restrictor is heated between the insulation |
| 6081065 |
Pumping system |
June 27, 2000 |
| To draw samples from a source of liquid, a pumping system measures the amount of liquid being pumped by detecting pump cycles and calculating the pumped liquid from this measurement and stored data including conduit size, pressure head and statistical data to correlate detected pump cycl |
| 6071408 |
Apparatus and method for supercritical fluid extraction |
June 6, 2000 |
| To provide performance particularly in handling supercritical extraction systems, a specially designed pump includes a cam-driven, single-plunger with a cam having a profile that enables the pumping system to avoid destructive reverse torque on the cam, gear train and drive motor after |
| 5996427 |
Liquid sample storage device |
December 7, 1999 |
| A liquid sample storage device which utilizes a liner-holder with a liner which may be disposed of after use, thereby eliminating contamination problems associated with reusable bottles. The liner-holder is a hollow, wedge shaped container with an upwardly extending neck section and vent |
| 5994146 |
Water impurity analysis method |
November 30, 1999 |
| To determine the total organic carbon content of a flowing liquid in a continuous process, water and oxidizing agents enter lower ports in a continuous column and flow upwardly along a helical path with air gaps as they are mixed. The helical reaction path is formed by a helical glass |
| 5981289 |
Hydrogen sulfide analyzer |
November 9, 1999 |
| A hydrogen sulfide analyzer that continuously samples waste water from a waste stream or reservoir and measures the concentration of purgeable H.sub.2 S present (H.sub.2 SP) This information, when combined with the volume of water present, provides a control quality signal that regulates |
| 5932095 |
Multi-chambered supercritical fluid extraction cartridge |
August 3, 1999 |
| A multiple chamber sample holding cartridge is used with a supercritical fluid extractor that causes membranes dividing the cartridge into chambers to rupture upon the pressurization of the sample cartridge, thereby allowing the intermixing of materials contained in the chambers. The |
| 5915932 |
Peristaltic pump having a roller support |
June 29, 1999 |
| The rollers of a peristaltic pump are supported to prevent said rollers from compressing said tube more than the thickness of the walls of the tube. A tube holder rotates along with the roller assembly of the peristaltic pump and keeps the tube in line with the rollers. |
| 5911881 |
Apparatus and method for collecting analyte in supercritical fluid extraction |
June 15, 1999 |
| To collect analyte from a supercritical fluid extractor, the collector lifts vials into place by a biasing device that guides the file up to the restrictor where it is sealed. The vial can be moved back down from the collecting mechanism even if frost forms on the vial while the restrict |
| 5901603 |
Liquid level monitor |
May 11, 1999 |
| A liquid level monitor using a pressure actuated sensor to replace the open bubble tube. Air flows down the supply tube as in the bubbler, but rather than being released into the water, the air enters a chamber that has one movable wall, such as a diaphragm, that is acted on from the ins |
| 5844147 |
Method and apparatus for water sampling utilizing solid phase extraction |
December 1, 1998 |
| A method and apparatus for water sampling utilizing on-site solid phase extraction that permits high sample flow rates and eliminates the requirement for sample storage. Samples are collected at a relatively high flow rate and then temporarily stored under pressure before passing thr |
| 5844137 |
Purge system |
December 1, 1998 |
| To measure flow rates, the cross-sectional shape of the flow path is changed by inserting a multiple position gate into the flow path and altering the position of the gate to maintain the head of liquid constant with a reduced flow cross section. The position of the multiple position |
| 5843294 |
Capillary electrophoresis sample injection technique |
December 1, 1998 |
| To inject sample into a capillary tube of an electrophoresis apparatus, a vacuum tank is connected to one end of the tube while the other end is in sample to impart a pressure difference across the tube. The pressure in the pressure chamber is sensed, integrated and used to determine and |
| 5789684 |
Liquid sample storage device |
August 4, 1998 |
| A liquid sample storage device which utilizes a liner-holder with a liner which may be disposed of after use, thereby eliminating contamination problems associated with reusable bottles. The liner-holder is a hollow, wedge shaped container with an upwardly extending neck section and vent |
| 5777892 |
Doppler shift velocity measuring system with correction factors |
July 7, 1998 |
| To determine the average velocity of a fluid stream, an ultrasonic signal is transmitted into the fluid and reflected ultrasonic signal received. The signals are mixed with a frequency of the transmitted ultrasonic signals. A Fourier transform is performed on the signals, the largest |
| 5755559 |
Apparatus and method for pumping supercritical fluid and measuring flow thereof |
May 26, 1998 |
| In a piston pump for pumping liquid carbon dioxide at a temperature below 30 degrees Fahrenheit and pressures at least as high as 7500 psi, the volume leaving the pump is determined by measuring only pressure or other parameter related to flow and movement of the plunger. The position of |
| 5750027 |
Apparatus and method for supercritical fluid extraction or supercritical fluid chromatography |
May 12, 1998 |
| A variable-orifice fluid restrictor for use with a supercritical extractor or chromatograph includes an inlet line for fluid at a pressure above its critical pressure, an extended tubular probe having an inner and an outer surface and a proximal and a distal end. The proximal end of the |
| 5738498 |
Apparatus and method for thermoelectric cooling of an extraction fluid pump |
April 14, 1998 |
| In a piston pump for pumping liquid carbon dioxide at a temperature below 30 degrees Fahrenheit and pressures at least as high as 7500 psi at an outlet flow rate in excess of 10 milliliters per minute, the inlet to the pump and the pumphead are each cooled by thermoelectric heat exchange |
| 5733789 |
Water impurity analysis method |
March 31, 1998 |
| To determine the total organic carbon content of a flowing liquid in a continuous process, water and oxidizing agents enter lower ports in a multi-stage column and flow upwardly through residence chambers as they are mixed. Spaced apart along the upper path of the liquid, there are h |
| 5726360 |
Fluid sampling apparatus having a universal base |
March 10, 1998 |
| To draw samples of fluid at remote locations, one of a plurality of sampler configurations is selected from configuations that have a universal base, a selected one of a composite container holder or locator, 12-container rain water runoff container holder and sequential sample multiple |
| 5701646 |
Method of making a sensor |
December 30, 1997 |
| A method of making a sensor wherein flexible conduit means is assembled with a fixture having a strain-sensitive film and electrical connections are made to the film whereby variations in fluid pressure in the conduit means can be detected. |
| 5690828 |
Apparatus and method for supercritical fluid extraction |
November 25, 1997 |
| To supply supercritical fluid to an automatic supercritical fluid extractor and collect extract from the extractor, sample holding cartridges are lifted one by one in series by an elevator plug into a pressure chamber. An inlet at the top of the cartridge engages a pressure vessel inlet |
| 5685965 |
Capillary electrophoresis technique |
November 11, 1997 |
| To detect bands in an electrophoresis capillary tube having a liquid separating medium, a light source and a light detector of a monitor are positioned on opposite sides of the capillary tube with the light source transmitting light through a first slit and light passing to the detector |
| 5670048 |
Preparatory supercritical fluid extraction using sealed chamber |
September 23, 1997 |
| A preparatory supercritical extraction cartridge includes a chamber for sample having a volume in the range of 20 cubic centimeters to 2,000 cubic centimeters. An inlet and an outlet are fastened to the cartridge walls by threads and sealed to said cartridge walls With spring loaded seal |
| 5653885 |
Apparatus and method for supercritical fluid extraction |
August 5, 1997 |
| To avoid deposits on the restrictor that channels extractant into a collector, a heated capillary tube pressure release restrictor, has a thermally insulated outlet end in a collecting trap substantially colder than the capillary tube. The restrictor is heated between the insulation |
| 5652397 |
Composite wastewater sampler |
July 29, 1997 |
| A composite wastewater sampler includes a flow-through-chamber having an inlet port and an outlet port with a path between them that gradually increases in depth and width and then decreases in width. It is shaped to cause fluid to: (1) flow from the inlet port; (2) drop to a lower level |
| 5635070 |
Apparatus and method for supercritical fluid extraction |
June 3, 1997 |
| To pump supercritical carbon dioxide into a supercritical extractor without overpressure in the reservoir and to record the volume being delivered, the pumping speed is controlled and the volume pumped is determined from a pressure-related signal used in a feedback circuit. The feedback |
| 5626732 |
Capillary electrophoresis technique |
May 6, 1997 |
| To detect bands in an electrophoresis capillary tube having a liquid separating medium, a light source and a light detector of a monitor are positioned on opposite sides of the capillary tube with the light source transmitting light through a first slit and light passing to the detector |
| 5614089 |
Apparatus and method for supercritical fluid extraction or supercritical fluid chromatography |
March 25, 1997 |
| A variable-orifice fluid restrictor for use with a supercritical extractor or chromatograph includes an inlet line for fluid at a pressure above its critical pressure, an extended tubular probe having an inner and an outer surface and a proximal and a distal end. The proximal end of the |
