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:
Nov. 30, 1999
Filed:
Aug. 11, 1997
Applicant:
Inventors:
Faizy Ahmed, Foothill Ranch, CA (US);
Toshihiko Hanai, Yokohama, JP;
Assignee:
Phenomenex, Torrance, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
2101982 ; 2105021 ; 210635 ; 210656 ; 502401 ;
Abstract
An alkyl-phenyl bonded a stationary phase for use in reversed-phase liquid chromatography, having five to ten carbon atoms in the alkyl group, is disclosed. The alkyl-phenyl bonded phase has its unique selectivity, and it is chemically stable in both acidic and basic environments as well as having high retention capacity, hence high resolution. A method for preparing the alkyl-phenyl bonded phase and a column inside of which the alkyl-phenyl bonded phase is packed with are also disclosed. Additionally, a method for performing liquid chromatography and a mixed stationary phase which has more than one alkyl-phenyl phases are disclosed.