The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2008
Filed:
Feb. 25, 2004
Amlan Datta, Rancho Cucamonga, CA (US);
Hamid Hojaji, Claremont, CA (US);
Shannon Marie Labernik, Rancho Cucamonga, CA (US);
David Leslie Melmeth, Upland, CA (US);
Thinh Pham, Kensington, AU;
Huagang Zhang, Yucaipa, CA (US);
Amlan Datta, Rancho Cucamonga, CA (US);
Hamid Hojaji, Claremont, CA (US);
Shannon Marie Labernik, Rancho Cucamonga, CA (US);
David Leslie Melmeth, Upland, CA (US);
Thinh Pham, Kensington, AU;
Huagang Zhang, Yucaipa, CA (US);
James Hardie International Finance B.V., Amsterdam, NL;
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.