Thinh V Pham

US Patent:

20040081827, Apr 29, 2004

Filed:

Aug 25, 2003

Appl. No.:

10/648184

Inventors:

Amlan Datta - Rancho Cucamonga CA, US
Hamid Hojaji - Claremont CA, US
David Melmeth - Upland CA, US
James McFarlane - Rancho Cucamonga CA, US
Thinh Pham - Rancho Cucamonga CA, US
Noel Thompson - Carlingford, AU
Huagang Zhang - Yucaipa CA, US

International Classification:

D02G003/00

US Classification:

428/384000, 428/367000

Abstract:

A synthetic microsphere having a low alkali metal oxide content and methods of forming the microsphere and its components are provided. The synthetic microsphere is substantially chemically inert and thus a suitable replacement for natural cenospheres, particularly in caustic environments such as cementitious mixtures. The synthetic microsphere can be made from an agglomerate precursor that includes an aluminosilicate material, such as fly ash, a blowing agent such as sugar, carbon black, and silicon carbide, and a binding agent. The synthetic microsphere is produced when the precursor is fired at a pre-determined temperature profile so as to form either solid or hollow synthetic microspheres depending on the processing conditions and/or components used.

US Patent:

20040262801, Dec 30, 2004

Filed:

Feb 25, 2004

Appl. No.:

10/787894

Inventors:

Hamid Hojaji - Claremont CA, US
Shannon Labernik - Rancho Cucamonga CA, US
Thinh Pham - Rancho Cucamonga CA, US
Huagang Zhang - Yucaipa CA, US

International Classification:

C04B035/64
C03B019/08

US Classification:

264/044000, 264/610000, 065/022000

Abstract:

A method of preparing a low-density material and precursor for forming a low-density material is provided. An aqueous mixture of inorganic primary component and a blowing agent is formed, the mixture is dried and optionally ground to form an expandable precursor. Such a precursor is then fired with activation of the blowing agent being controlled such that it is activated within a predetermined optimal temperature range. Control of the blowing agent can be accomplished via a variety of means including appropriate distribution throughout the precursor, addition of a control agent into the precursor, or modification of the firing conditions such as oxygen deficient or fuel rich environment, plasma heating etc.

US Patent:

20090146108, Jun 11, 2009

Filed:

Nov 6, 2008

Appl. No.:

12/266370

Inventors:

Amlan Datta - Rancho Cucamonga CA, US
Hamid Hojaji - Las Vegas NV, US
Shannon Marie Labernik - Rancho Cucamonga CA, US
David Leslie Melmeth - Upland CA, US
Thinh Pham - Rancho Cucamonga CA, US
Huagang Zhang - Yucaipa CA, US

International Classification:

C04B 20/06
C08J 9/04

US Classification:

252378 R, 521 50

Abstract:

A method of preparing a low-density material and precursor for forming a low-density material is provided. An aqueous mixture of inorganic primary component and a blowing agent is formed, the mixture is dried and optionally ground to form an expandable precursor. Such a precursor is then fired with activation of the blowing agent being controlled such that it is activated within a predetermined optimal temperature range. Control of the blowing agent can be accomplished via a variety of means including appropriate distribution throughout the precursor, addition of a control agent into the precursor, or modification of the firing conditions such as oxygen deficient or fuel rich environment, plasma heating etc.

US Patent:

20100192808, Aug 5, 2010

Filed:

Dec 30, 2009

Appl. No.:

12/650333

Inventors:

Amlan Datta - Rancho Cucamonga CA, US
Hamid Hojaji - Las Vegas NV, US
David L. Melmeth - Upland CA, US
James A. McFarlane - Breakfast Point, AU
Thinh Pham - Rancho Cucamonga CA, US
Noel E. Thompson - Carlingsford, AU
Huagang Zhang - Yucaipa CA, US

International Classification:

C04B 14/02
C04B 7/00
C04B 14/38
C04B 14/04
C04B 16/00

US Classification:

106672, 106638, 106816, 106805

Abstract:

A building product incorporating synthetic microspheres having a low alkali metal oxide content is provided. The synthetic microspheres are substantially chemically inert and thus a suitable replacement for natural cenospheres, particularly in caustic environments such as cementitious mixtures. The building product can have a cementitious matrix such as a fiber cement product. The synthetic microspheres can be incorporated as a low density additive and/or a filler for the building product and/or the like.

US Patent:

20210114933, Apr 22, 2021

Filed:

Oct 20, 2020

Appl. No.:

17/075316

Inventors:

- Dublin 2, IE
Huagang ZHANG - Rancho Cucamonga CA, US
Jongmin KEUM - Rancho Cucamonga CA, US
Yongjun CHEN - Rancho Cucamonga CA, US
Yan LI - Rancho Cucamonga CA, US
Weiling PENG - Rancho Cucamonga CA, US
Thinh PHAM - Yucaipa CA, US
Farshad J. MOTAMEDI - Mission Viejo CA, US
Lijun MAO - Rancho Cucamonga CA, US
Thomas MUELLER - Yucaipa CA, US

International Classification:

C04B 28/04
E04C 5/07
C04B 14/06
C04B 14/08
C04B 14/18
C04B 18/24
C04B 22/06

Abstract:

A fiber cement material formulation comprising a cementitious binder, a siliceous material, fiber, alumina trihydrate and a bifunctional low density additive wherein the bifunctional low density additive comprises any one or more of diatomaceous earth, recycled autoclave fiber cement dust or cellulose dust. The fiber cement material formulation optionally further comprises a secondary low density additive which may be perlite. In some embodiments, a fiber cement article manufactured from the fiber cement material formulation comprises a density of approximately 1.1 g/cmor below.