Dale L Clay, 702431 Devonshire Dr, Lincoln, NE 68506

6296769, Oct 2, 2001

Aug 2, 1999

9/366128

Henry Walters - Lincoln NE
Dale Messer - Lincoln NE
Dale Clay - Lincoln NE
Robert W. Allington - Lincoln NE

Isco, Inc. - Lincoln NE

B01D 1102
B01D 3500

210637

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 neutral oil and loss determination of soybean and other oilseed oils by supercritical fluid extraction is efficient with this two-chambered sample cartridge.

5094753, Mar 10, 1992

Jul 13, 1990

7/553119

Robert W. Allington - Lincoln NE
Dale L. Clay - Lincoln NE
Daniel G. Jameson - Lincoln NE
Robin R. Winter - Lincoln NE

Isco, Inc. - Lincoln NE

B01D 1100

210634

An apparatus for supercritical fluid extraction incorporates a removable extraction cartridge which in operation has insignificant pressure difference between its inside and outside walls. Because of the low pressure difference, the extraction cartridge need not have the strength to withstand significant pressure and can be made out of molded plastic for disposable use as well as stainless steel and machined plastic for reusability. The extraction cartridge can be removed and opened for sample access without the use of tools. The outside of the cartridge can be purged after it is installed in a heated high pressure vessel to remove contamination from its exterior.

5250195, Oct 5, 1993

Oct 23, 1992

7/966083

Robin R. Winter - Lincoln NE
Daniel G. Jameson - Lincoln NE
Dale L. Clay - Lincoln NE
Robert W. Allington - Lincoln NE

Isco, Inc. - Lincoln NE

B01D 1104

210634

An apparatus for supercritical fluid extraction incorporates a removable extraction cartridge which in operation has insignificant pressure difference between its inside and outside walls. In one embodiment, the extractor includes a fraction collector for extractants, an automatic sample changer and an automatic cartridge transfer mechanism which provide completely automated extractions. To automatically perform extraction, valves for the fluids are automatically opened and closed in synchronism with the insertion and removal of the cartridges. These valves force a hard valve element into a softer valve seat with a valve stem that does not rotate significantly under the control of a rotary motor.

5690828, Nov 25, 1997

Feb 14, 1996

8/601250

Dale Lee Clay - Lincoln NE
Robert William Allington - Lincoln NE
Phillip Bearnard Liescheski - Lincoln NE
Robin Randall Winter - Lincoln NE
Daniel Gene Jameson - Lincoln NE

Isco, Inc. - Linclon NE

B01D 1100
B01D 1712

210634

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 for the extractant so that extractant flows into the cartridge and into the space between the cartridge and inner walls of the pressure chamber. The outlets from the cartridge and pressure vessel communicate with the collector and exhaust through passageways in the plug. The plug has cleaning ports for cleaning seals and the outlet from the cartridge flows past the seals. The collector lifts vials into place and can precool the collection solvent, and later as part of the collection procedure, heat and pressurize the collector.

5911881, Jun 15, 1999

Nov 24, 1997

8/976768

Dale Lee Clay - Nebraska City NE
Robert W. Allington - Lincoln NE
Philip Bernard Liescheski - Lincoln NE
Robin Randall Winter - Newberg OR
Daniel Gene Jameson - Lincoln NE

Isco, Inc. - Lincoln NE

B01D 1100

210634

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 restrictor remains stationary. This vial is held in place by a guide that contains the seal for sealing the vial when it is raised in place.

5755559, May 26, 1998

Jun 26, 1996

8/673177

Robert William Allington - Lincoln NE
Daniel Gene Jameson - Lincoln NE
Dale A. Davison - Greenwood NE
Dale Clay - Lincoln NE
Robin R. Winter - Newburg OR
Yoossef Tehrani - Lincoln NE

Isco, Inc. - Lincoln NE

F04B 4900

417 53

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 the piston is measured and the resulting displacement is integrated to determine volume of fluid pumped.

5173188, Dec 22, 1992

Mar 5, 1992

7/847652

Robin R. Winter - Lincoln NE
Robert W. Allington - Lincoln NE
Daniel G. Jameson - Lincoln NE
Dale L. Clay - Lincoln NE

Isco, Inc. - Lincoln NE

B01D 1100

210634

An apparatus for supercritical fluid extraction incorporates a removable extraction cartridge which in operation has insignificant pressure difference between its inside and outside walls. In one embodiment, the extractor includes a fraction collector for extractants, an automatic sample changer and an automatic cartridge transfer mechanism which provide completely automated extractions. To automatically perform extraction, valves for the fluids are automatically opened and closed in synchronism with the insertion and removal of the cartridges. These valves force a hard valve element into a softer valve seat with a valve stem that does not rotate significantly under the control of a rotary motor.

6071408, Jun 6, 2000

May 18, 1998

9/080826

Robert William Allington - Lincoln NE
Daniel Gene Jameson - Lincoln NE
Dale A. Davison - Greenwood NE
Dale Clay - Lincoln NE
Robin R. Winter - Newburg OR
Yoossef Tehrani - Lincoln NE

Isco, Inc. - Lincoln NE

B01D 1100
B01D 1712

210634

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 the cam passes top dead center. The fluid volume leaving the pump is determined by measuring only pressure or other parameters related to flow and movement of the plunger. Measurement of the fluid volume leaving the pump is useful for recording or indicating the flow rate while the pump is operating.