Stanley O Johnson

US Patent:

59328185, Aug 3, 1999

Filed:

Sep 30, 1997

Appl. No.:

8/941209

Inventors:

Vincent J. Novick - Downers Grove IL
Stanley A. Johnson - Countryside IL

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G01N 2101

US Classification:

7386322

Abstract:

A vapor sample detection method where the vapor sample contains vapor and ambient air and surrounding natural background particles. The vapor sample detection method includes the steps of generating a supply of aerosol that have a particular effective median particle size, mixing the aerosol with the vapor sample forming aerosol and adsorbed vapor suspended in an air stream, impacting the suspended aerosol and adsorbed vapor upon a reflecting element, alternatively directing infrared light to the impacted aerosol and adsorbed vapor, detecting and analyzing the alternatively directed infrared light in essentially real time using a spectrometer and a microcomputer and identifying the vapor sample.

US Patent:

49422979, Jul 17, 1990

Filed:

Nov 18, 1988

Appl. No.:

7/273395

Inventors:

Stanley A. Johnson - Countryside IL
Gerald T. Reedy - Bourbonnais IL
Romesh Kumar - Naperville IL

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G01N 2101

US Classification:

250304

Abstract:

Apparatus for analyzing aerosols in essentially real time includes a virtual impactor which separates coarse particles from fine and ultrafine particles in an aerosol sample. The coarse and ultrafine particles are captured in PTFE filters, and the fine particles impact onto an internal light reflection element. The composition and quantity of the particles on the PTFE filter and on the internal reflection element are measured by alternately passing infrared light through the filter and the internal light reflection element, and analyzing the light through infrared spectrophotometry to identify the particles in the sample.

US Patent:

50860348, Feb 4, 1992

Filed:

Sep 28, 1990

Appl. No.:

7/589562

Inventors:

Uthamalingam Balachandran - Hinsdale IL
Roger B. Poeppel - Glen Ellyn IL
James E. Emerson - Plainfield IL
Stanley A. Johnson - Countryside IL

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

H01L 3912
C01F 1700

US Classification:

505 1

Abstract:

An improved method for the preparation of single phase, fine grained ceramic materials from precursor powder mixtures where at least one of the components of the mixture is an alkali earth carbonate. The process consists of heating the precursor powders in a partial vacuum under flowing oxygen and under conditions where the partial pressure of CO. sub. 2 evolved during the calcination is kept to a very low level relative to the oxygen. The process has been found particularly suitable for the preparation of high temperature copper oxide superconducting materials such as YBa. sub. 2 Cu. sub. 3 O. sub. x "123" and YBa. sub. 2 Cu. sub. 4 O. sub. 8 "124".