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:
Sep. 16, 2008
Filed:
Mar. 24, 2003
Chandan K. Saha, West Bloomfield, MI (US);
Aleksander J. Pyzik, Midland, MI (US);
Arthur R. Prunier, Jr., Midland, MI (US);
Sten A. Wallin, Midland, MI (US);
Clifford S. Todd, Midland, MI (US);
Chandan K. Saha, West Bloomfield, MI (US);
Aleksander J. Pyzik, Midland, MI (US);
Arthur R. Prunier, Jr., Midland, MI (US);
Sten A. Wallin, Midland, MI (US);
Clifford S. Todd, Midland, MI (US);
Dow Global Technologies Inc., Midland, MI (US);
Abstract
A method of forming a porous mullite composition of acicular mullite grains having improved properties is described, where the mullite is formed at some time in the presence of a fluorine containing gas. For example, it has been discovered that improved properties may result from heating the mullite to a high temperature in an atmosphere selected from the group consisting of water vapor, oxygen, an inert gas or mixtures thereof or forming the mullite composition from precursors having an AL/Si ratio of at most 2.95.