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:
Aug. 09, 2011
Filed:
Oct. 07, 2003
Basil Naji, Toongabbie, AU;
Donald J. Merkley, Alta Loma, CA (US);
Michael Zammit, Lidcombe, AU;
Caidian Luo, Alta Loma, CA (US);
Basil Naji, Toongabbie, AU;
Donald J. Merkley, Alta Loma, CA (US);
Michael Zammit, Lidcombe, AU;
Caidian Luo, Alta Loma, CA (US);
James Hardie Technology Limited, Dublin, IE;
Abstract
A cementitious product and method of modifying the properties of a low or medium density FRC product by providing a predetermined pore size distribution. The pore size distribution is obtained such that in critical zones of the distribution, the pore volume is substantially equivalent to or less than the pore volume in a respective critical zone of a conventional high density FRC product. The resultant material provides improved properties over conventional medium density FRC products, in particular improved freeze/thaw durability and/or improved workability.