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:
Aug. 11, 1992
Filed:
Feb. 21, 1989
Applicant:
Inventors:
Ritchard C Parry, Port Matilda, PA (US);
Daryl J Gisch, Boalsburg, PA (US);
Assignee:
Rohm and Haas Company, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
2101982 ; 2105021 ; 210656 ; 436178 ; 436527 ; 436816 ; 436901 ; 502407 ; 530834 ; 552-4 ; 552-5 ; 556427 ;
Abstract
The bonded phases generated from the reaction of aliphatic and aromatic azidosilanes with silica gel are suitable for use as packings in solid phase extraction columns for cleanup of urine samples for analysis of acid metabolites of cannabinoids. Such bonded phases are unique in their ability to selectively retain the acid metabolites of cannabinoids from a urine sample matrix.