Charles L Guthrie

US Patent:

6446721, Sep 10, 2002

Filed:

Mar 23, 2001

Appl. No.:

09/816848

Inventors:

Anilkumar Patel - Fremont CA
Charles F. Guthrie - Richmond CA
Loren J. Lederhos - Bakersfield CA
James R. Ouimette - Petaluma CA

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

E21B 4324

US Classification:

1662521, 1662723

Abstract:

The invention includes a method of scheduling cyclic steaming of a group of petroleum-containing wells including: inputting to a production-predicting means a group of data describing at least in part the past cyclic steaming and resulting production of a group of petroleum-containing wells; processing the data in the production-predicting means and outputting a group of production predictions for the group of wells during a future steaming cycle; inputting the group of production predictions into an optimization means; inputting an initial steaming cycle schedule for the group of wells into the optimization means; processing the group of production predictions and the initial steaming cycle schedule in the optimization means by the steps including: determining a ranking for the initial steaming cycle schedule for the group of production predictions against a pre-determined ranking criteria; producing a group of new steaming cycle schedules based on the ranking of the initial steaming cycle a schedule optimization algorithm; determining a ranking for the new steaming cycle schedules against the pre-determined ranking criteria; repeating the production of new steaming cycle schedules and determining ranking steps until some pre-determined termination criteria is met; and outputting a final steaming cycle schedule.

US Patent:

8227993, Jul 24, 2012

Filed:

Jun 2, 2006

Appl. No.:

12/224344

Inventors:

Andrew Neate - Bukinghamshire, GB
Charles Guthrie - San Jose CA, US

Assignee:

Ceravision Limited - Milton Keynes

International Classification:

H05B 37/00

US Classification:

315 39, 315248

Abstract:

A lamp with a quartz electrodeless bulb has a ceramic wave guide with a central void, in which the bulb is accommodated. The wave guide is rectangular. The central void is centered on a central longitudinal plane of the wave guide, normal to front and back faces of the wave guide and equally spaced from end faces. Parallel with the central void and also on the central plane are two further voids for respective antennae. The central void is open through the front face for egress of light, but the antenna voids are not open in this face. The latter is metalized to inhibit egress of microwave energy from the wave guide.

US Patent:

8241082, Aug 14, 2012

Filed:

Dec 23, 2005

Appl. No.:

11/794490

Inventors:

Charles Guthrie - San Jose CA, US
Donald Wilson - San Jose CA, US
Floyd Pothoven - Lakewood CA, US
Eddie Odell - Leicester, GB
Robin Devonshire - Sheffield, GB

Assignee:

Ceravision Limited - Milton Keynes

International Classification:

H01J 9/00

US Classification:

445 43, 445 42

Abstract:

A method of making an electrodeless incandescent bulb comprises the steps of:.

US Patent:

20010035720, Nov 1, 2001

Filed:

Mar 26, 2001

Appl. No.:

09/818092

Inventors:

Charles Guthrie - San Jose CA, US
Edmund Sandberg - Monte Sereno CA, US
Donald Wilson - San Jose CA, US
Gregory Prior - San Jose CA, US

International Classification:

H01J065/04

US Classification:

315/039000, 315/248000

Abstract:

In one aspect the plasma lamp according to the present invention comprises a gas envelope that is constructed from ceramic material and a sapphire window rather than quartz. According to another aspect of the present invention, a plasma lamp comprises an RF structure for the radio wave radiation and an envelope for housing the excitation gas that are formed so as to constitute a single, integrated ceramic structure. According to yet another aspect of the present invention, the plasma lamp comprises a waveguide structure having solid material such as ceramic rather than air for the dielectric and a gas housing made of a combination of solid ceramic and a sapphire window. In this way, the separate quartz gas envelope and air-filled waveguide structure employed in the prior art are replaced by a single, integrated structure.

US Patent:

20080203922, Aug 28, 2008

Filed:

Jan 24, 2008

Appl. No.:

12/011418

Inventors:

Charles Guthrie - San Jose CA, US
Edmund Sandberg - Monte Sereno CA, US
Donald Wilson - San Jose CA, US
Greg Prior - San Jose CA, US
David Smoler - Morgan Hill CA, US

Assignee:

Ceravision Limited - Central Milton Keynes

International Classification:

H01J 61/30

US Classification:

313635, 313567, 313643

Abstract:

A plasma lamp is provided having an integrated dielectric waveguide structure having a body, a gas housing formed within the body and having an aperture formed at a first outer surface of the body, a fill mixture disposed within the gas housing, and a probe operatively coupled to the body so that microwave energy supplied to the fill mixture forms a plasma that emits high intensity light.

US Patent:

20130040529, Feb 14, 2013

Filed:

Jul 5, 2012

Appl. No.:

13/541838

Inventors:

Charles Guthrie - San Jose CA, US
Edwin Charles Odeil - Leicester, GB
Robin Devonshire - Sheffield, GB
Donald Wilson - San Jose CA, US
Floyd Pothoven - Lakewood CA, US

International Classification:

H01J 9/38

US Classification:

445 40, 445 39

Abstract:

The manufacture of an electrodeless bulb involves one end of a tube closed off, and a first neck is formed in the tube close to the closed end. A second neck is formed in the tube, close to the still open end; a metal halide pellet of known size is dropped into the tube and the tube is evacuated. With the vacuum being maintained heat is applied to the closed end, causing the metal halide pellet to sublime and with it the impurities. The impurities are drawn off, the vacuum being maintained and the metal halide condenses in the tube between the necks. Once the tube is cool, the evacuation is discontinued and the tube is refilled with noble gas and the quartz tube is sealed off at the second neck.