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. 17, 1992
Filed:
Jan. 16, 1991
John A Walling, Round Lake Beach, IL (US);
Hsiang-Yun Hu, Libertyville, IL (US);
Barbara E Hasz, Park Ridge, IL (US);
Abbott Laboratories, Abbott Park, IL (US);
Abstract
Disclosed is a substantially optically pure hapten, useful in an immunoassay for cotinine. The hapten corresponds to a specified structural formula (I). In formula (I) X is a straight or branched chain, saturated or unsaturated, divalent radical covalently bonded to a pyridyl ring at the number 2-, 4-, 5- or 6-position. The divalent radical, X, has from 1 to 10 carbon atoms wherein the chain of the divalent radical optionally may contain 1 or 2 hetero atoms selected from members of the group consisting of S, O and NZ in which Z represents a C.sub.1 to C.sub.3 alkyl group. In formula (I), n=1 or 0, and Q is a functional group selected from --COOH, --NH.sub.2 (provided that n does not equal 0), --C(O)NHNH.sub.2, --O(CO)Cl, --CHO, --NCS or --NCO. Also disclosed is an immunogen derived from the hapten as well as an antibody raised in response to an immunogen derived from the hapten. Also disclosed is a fluorescent tracer derived from a substantially optically pure compound corresponding to the hapten, the tracer being useful in an immunoassay for cotinine. Also disclosed is an improved immunoassay for determining cotinine in a biological sample involving a step of contacting the sample with antibodies raised in response to the immunogen. Also disclosed is a fluorescence polarization immunoassay (FPIA) for determining cotinine involving a step of contacting the sample with antibodies raised in response to the immunogen, and/or involving a step of contacting the sample with a fluorescent tracer.