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. 24, 2026
Filed:
Mar. 02, 2023
Chevron U.s.a. Inc., San Ramon, CA (US);
Christopher Michael Lew, Alameda, CA (US);
Rebecca Edyne Maclean, Pleasanton, CA (US);
Kurt Owen Jensen, Richmond, CA (US);
CHEVRON U.S.A. INC., San Ramon, CA (US);
Abstract
A method is disclosed for producing small crystal forms of zeolite SSZ-81. The method includes forming a reaction mixture containing an alumina-coated silica sol, a source of an alkali metal, a structure directing agent containing 1,5-bis(N-methylpiperidinium)pentane dications and/or 1,5-bis(1-azonia-bicyclo[2.2.2]octane)pentane dications, a source of hydroxide ions, and water; and subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the zeolite. The compositions made according to that method, as well as the various uses of the compositions, are also disclosed.