JOHN E CAMPBELL
Electrician at Broadmeadow, San Antonio, TX

6813960, Nov 9, 2004

Aug 19, 2002

10/223567

Thomas E. Owen - Helotes TX
David L. Davidson - San Antonio TX
John B. Campbell - San Antonio TX
Andrew Nagy - late of San Antonio TX

Southwest Research Institute - San Antonio TX

G01N 332

73808, 73794

A column assembly for use in conjunction with a test machine, for inducing high-cycle fatigue (at kilohertz vibration rates) in a specimen of a material under test. The column assembly has isolation masses, a specimen grip, and two actuators, the latter for imparting dynamic forces to the test specimen. The actuators are arranged on the column assembly asymmetrically relative to the test specimen.

6601456, Aug 5, 2003

Jun 6, 2001

09/875563

David L. Davidson - San Antonio TX
Thomas E. Owen - Helotes TX
John B. Campbell - San Antonio TX

Southwest Research Institute - San Antonio TX

G01N 300

73808, 73794, 73 83, 73 7

A fretting fixture accessory for a_test machine ( ) that induces high-cycle fatigue (at kilohertz vibration rates) in a specimen of a material under test. The fretting fixture ( ) is clamped to the test specimen ( ), for the purpose of testing for fretting damage. The fixture ( ) is designed to provide both the normal and shearing forces that result in fretting damage.

6143141, Nov 7, 2000

Sep 12, 1997

8/928992

Gerald R. Leverant - San Antonio TX
James Arps - San Antonio TX
John Campbell - San Antonio TX
Richard Page - San Antonio TX

Southwest Research Institute - San Antonio TX

C23C 1434

20419215

Superalloy substrates bearing a rhenium diffusion barrier, and a method of forming a rhenium diffusion barrier between a superalloy substrate and an overlay coating comprising aluminum. The method involves depositing a rhenium film onto the surface of a superalloy substrate and subjecting the rhenium film to first conditions effective to cause a minor portion of rhenium atoms to penetrate the surface of the superalloy substrate and second conditions effective to cause a minority of the rhenium atoms to diffuse into the substrate, forming a diffusion barrier comprising an interfacial zone comprising a mixture of rhenium atoms and atoms of the superalloy substrate covered by a rhenium film. The diffusion barrier is effective to suppress diffusion of aluminum from the overlay coating under static oxidation testing conditions.

6001500, Dec 14, 1999

Jun 5, 1997

8/869795

Edward Albert Bass - San Antonio TX
Patrick Martin Merritt - San Antonio TX
Christopher Alan Sharp - San Antonio TX
Craig Marshall Wall - San Antonio TX
John Campbell - San Antonio TX

H01M 810

429 31

The present invention provides a method of manufacturing a cylindrical fuel cell comprising: providing an anode comprising a substantially solid cylindrical porous conductive matrix, said anode having an anode outer surface; intimately contacting a first proton exchange catalyst with said anode; conforming around and in intimate contact with said anode outer surface an inner polymer electrolyte membrane comprising a membrane outer surface and a membrane inner surface, wherein said membrane inner surface defines a tubular compartment and ionically communicates with said first proton exchange catalyst; providing a source of hydrogen gas in fluid communication with said first proton exchange catalyst; and, disposing around and in ionic communication with said membrane outer surface a cathode comprising a catalytically effective amount of a second proton exchange catalyst.