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. 07, 1993
Filed:
Jun. 11, 1992
Applicant:
Inventors:
David A Cooper, Morrisville, PA (US);
Raymond P Denkewicz, East Norriton, PA (US);
Elliot P Hertzenberg, Wilmington, DE (US);
Assignee:
PQ Corporation, Valley Forge, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423714 ; 423D / ; 502 79 ; 502 85 ;
Abstract
Y-type zeolites with unit cell constants of less than 24.14 .ANG. are prepared by improving the method of dealumination and aluminum ion exchange. Zeolites with such low unit cell constants have not been known previously.