Walter W Stephens

US Patent:

7976949, Jul 12, 2011

Filed:

Mar 12, 2008

Appl. No.:

12/075710

Inventors:

Kevin R. Dickson - Hudson OH, US
Walter T. Stephens - Cleveland OH, US
Tihana Fuss - Marlborough MA, US

Assignee:

Saint-Gobain Ceramics & Plastics, Inc. - Worcester MA

International Classification:

B32B 5/16
B28B 1/00

US Classification:

428403, 428404, 428406, 501153

Abstract:

One embodiment of the present invention relates to spherical ceramic elements, such as proppants, for maintaining permeability in subterranean formations to facilitate extraction of oil and gas therefrom. The strength of the ceramic element may be enhanced by combining materials having different coefficients of thermal expansion. Methods of making the ceramic elements are also disclosed.

US Patent:

20090170731, Jul 2, 2009

Filed:

Dec 24, 2008

Appl. No.:

12/343940

Inventors:

Walter T. Stephens - Cleveland OH, US

International Classification:

C09K 8/80

US Classification:

507200

Abstract:

A mixture of proppant particles and conductivity enhancing structures is disclosed. The spherically shaped proppant particles have convex surfaces. The conductivity enhancing structures include concave surfaces. The proppant particles' convex surfaces abut the conductivity enhancing structures concave surfaces.

US Patent:

20110265995, Nov 3, 2011

Filed:

Jul 7, 2011

Appl. No.:

13/177798

Inventors:

Kevin R. DICKSON - Cuyahoga Falls OH, US
Walter T. Stephens - Cleveland OH, US
Tihana Fuss - Stow OH, US

International Classification:

E21B 43/267

US Classification:

1662801

Abstract:

One embodiment of the present invention relates to spherical ceramic elements, such as proppants, for maintaining permeability in subterranean formations to facilitate extraction of oil and gas therefrom. The strength of the ceramic element may be enhanced by combining materials having different coefficients of thermal expansion. Methods of making the ceramic elements are also disclosed.

US Patent:

20110268877, Nov 3, 2011

Filed:

Jul 7, 2011

Appl. No.:

13/177787

Inventors:

Kevin R. Dickson - Cuyahoga Falls OH, US
Walter T. Stephens - Cleveland OH, US
Tihana Fuss - Stow OH, US

International Classification:

B05D 3/02

US Classification:

427215

Abstract:

One embodiment of the present invention relates to spherical ceramic elements, such as proppants, for maintaining permeability in subterranean formations to facilitate extraction of oil and gas therefrom. The strength of the ceramic element may be enhanced by combining materials having different coefficients of thermal expansion. Methods of making the ceramic elements are also disclosed.

US Patent:

20130123152, May 16, 2013

Filed:

Feb 8, 2011

Appl. No.:

13/576412

Inventors:

Walter T. Stephens - Cleveland OH, US
Kevin R. Dickson - Little Rock AR, US
Tihana Fuss - Stow OH, US
Ian Jaeger - Richardson TX, US
Danny Louis Mickelson - Alma AR, US
Suchira Sen - Saltalke, IN
Thomas Szymanski - Hudson OH, US

International Classification:

C09K 8/80

US Classification:

507269

Abstract:

Disclosed is a population of ceramic particles that includes a plurality of individual, free flowing particles. The plurality has a total weight and particle size distribution. The effective width of the distribution is the difference between the distribution's dand dparticle sizes. The distribution's effective width exceeds 100 microns and includes three abutting and non-overlapping regions that include a first region, a second region, and a third region. The first region abuts the second region and the second region abuts the third region. The width of the second region is at least 25% of the effective width. The weight of particles in the second region does not exceed 15% of the plurality of particle's total weight. The weight of particles in the first region and the third region each exceed the weight of particles in the second region. Methods of making the populations of ceramic particles are also disclosed.

US Patent:

20140011658, Jan 9, 2014

Filed:

Mar 26, 2012

Appl. No.:

14/005278

Inventors:

Tihana Fuss - Stow OH, US
Laurie San-Miguel - Cavaillon, FR
Kevin R. Dickson - Little Rock AR, US
Walter T. Stephens - Cleveland OH, US

Assignee:

Saint-Gobain Ceramics & Plastics, Inc. - Worcester MA

International Classification:

C03C 14/00
C03C 10/00

US Classification:

501 2, 501 32, 264642

Abstract:

A ceramic particle with at least two microstructural phases comprising an amorphous phase, representing between 30 volume percent and 70 volume percent of the particle, and a first substantially crystalline phase comprising a plurality of predominately crystalline regions distributed through the amorphous phase is disclosed. A process for making the ceramic particle is also disclosed.

US Patent:

20190211560, Jul 11, 2019

Filed:

Mar 19, 2019

Appl. No.:

16/358672

Inventors:

- Malvern PA, US
Keith C. Hong - Lilitz PA, US
Walter T. Stephens - Cleveland OH, US

International Classification:

E04D 1/12
E04D 5/12
C04B 18/02
C04B 33/04
C04B 33/14
C04B 35/626
E04D 7/00
C04B 35/63
C04B 35/636
C04B 35/64
C04B 35/628

Abstract:

Solar reflective roofing granules include a binder and inert mineral particles, with solar reflective particles dispersed in the binder. An agglomeration process preferentially disposes the solar reflective particles at a desired depth within or beneath the surface of the granules.