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. 28, 1999
Filed:
Oct. 17, 1997
Applicant:
Inventors:
Robert Scott Smith, Houston, TX (US);
Johannes Petrus Verduijn, deceased, late of Leefdaal, BE;
Jannetje Maatje van den Berge, executrix, Oostvoorne, NL;
Thomas H Colle, Houston, TX (US);
Gary David Mohr, League City, TX (US);
Gotz Burgfels, Bad Aibling, DE;
Josef Schonlinner, Obing, DE;
Assignee:
Exxon Chemical Patents Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423700 ; 423702 ; 423709 ; 423711 ; 423716 ; 423D / ; 423D / ;
Abstract
Large crystal zeolites are prepared by heating a zeolite synthesis mixture under agitation to a temperature equal to or less than the effective nucleation temperature of the zeolite synthesis mixture and thereafter the zeolite synthesis mixture is heated without agitation to a temperature equal to or greater than the effective nucleation temperature of the zeolite synthesis mixture.