Keith W Stephens

US Patent:

20120302673, Nov 29, 2012

Filed:

May 23, 2012

Appl. No.:

13/478236

Inventors:

Keith Edward Stephens - Waxahachie TX, US
Nicholas R. Soto - Waxahachie TX, US
Denis Muki Tibah - Waxahachie TX, US

Assignee:

BUILDING MATERIALS INVESTMENT CORPORATION - Wilmington DE

International Classification:

C08L 95/00

US Classification:

524 64

Abstract:

The present invention relates to a method for preparing an industrial asphalt comprising sparging an oxygen containing gas through an asphalt flux in the presence of 0.25 weight percent to about 12 weight percent of a highly saturated rubbery polymer at a temperature within the range of about 400 F. to about 550 F. for a period of time which is sufficient to increase the softening point of the asphalt flux to a value which is within the range of 185 F. to 250 F. and a penetration value of at least 15 dmm to produce the industrial asphalt. The highly saturated rubbery polymer can be a styrene-ethylene/butylene-styrene block copolymer rubber or a highly saturated styrene-ethylene/propylene-styrene block copolymer rubber.

US Patent:

20150087734, Mar 26, 2015

Filed:

Nov 26, 2014

Appl. No.:

14/554180

Inventors:

Keith Edward Stephens - Waxahachie TX, US
Nicholas R. Soto - Waxahachie TX, US
Denis Muki Tibah - Waxahachie TX, US

Assignee:

BUILDING MATERIAL INVESTMENT CORPORATION - Wilmington DE

International Classification:

C08L 95/00

US Classification:

521 83, 524 70

Abstract:

The present invention relates to a method for preparing an industrial asphalt comprising sparging an oxygen containing gas through an asphalt flux in the presence of 0.25 weight percent to about 12 weight percent of a highly saturated rubbery polymer at a temperature within the range of about 400 F. to about 550 F. for a period of time which is sufficient to increase the softening point of the asphalt flux to a value which is within the range of 185 F. to 250 F. and a penetration value of at least 15 dmm to produce the industrial asphalt. The highly saturated rubbery polymer can be a styrene-ethylene/butylene-styrene block copolymer rubber or a highly saturated styrene-ethylene/propylene-styrene block copolymer rubber.

US Patent:

20140263779, Sep 18, 2014

Filed:

Jun 13, 2013

Appl. No.:

13/916713

Inventors:

- Wilmington DE, US
Denis Muki Tibah - Dallas TX, US
Keith Edward Stephens - Waxahachie TX, US

International Classification:

B28C 7/04
B02C 19/00

US Classification:

241 62, 366 16, 366 19

Abstract:

A continuous system for making shingles from recyclable material is provided comprising a milling device to receive recyclable material and process the recyclable material into particulate and a transfer device to receive and transfer the particulate from the milling device. An apparatus receives the particulate from the transfer device and weighs the particulate. A continuous processor receives the particulate and reacts and/or mixes the particulate with at least one admixture to form a homogenous mixture. A filler mixer receives the homogenous mixture and incorporates the homogenous mixture with shingle material to form core product and a control panel controls input of the homogenous mixture into the filler mixer.