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:
Feb. 18, 2003
Filed:
Dec. 19, 2000
Applicant:
Inventors:
David A. Cooper, Morrisville, PA (US);
William E. Cormier, Lansdale, PA (US);
Elliot P. Hertzenberg, Wilmington, DE (US);
Richard J. Hinchey, Blue Bell, PA (US);
Bonita K. Marcus, Radnor, PA (US);
Assignee:
PQ Corporation, Valley Forge, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 3/924 ; B01J 2/908 ;
U.S. Cl.
CPC ...
C01B 3/924 ; B01J 2/908 ;
Abstract
A hydrophobic zeolite is prepared having high Hydrophobicity Index number by calcining a zeolite with steam under turbulent condition with respect to flow pattern of the zeolite and at a temperature within the range of 650-1000° C.