US4053459A
Expired / Lapsed
US
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Antibody specific to methaqualone and its metabolites
Assignee: Hoffmann La Roche Inc
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Filing: 1975-09-24
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Granted: 1977-10-11
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Expires: 1995-09-24
Abstract
Abstract A sensitive radioimmunoassay for methaqualone and its major metabolites is described. Included within this disclosure is the preparation of novel methaqualone haptens, the preparation of antigens from such haptens by coupling to an immunogenic carrier material, the use of such antigens to elicit antibodies selective to methaqualone and its major metabolites and an improved radiolabelled derivative of a methaqualone analog used in the practice of said radioimmunoassay.
Inventors
- 👤 James Gordon Christenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:56
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/70; C07D239/72; C07D239/86; C07D239/88; C07D239/91; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/94; G01N33/948; Y; Y10; Y10S; Y10S436/00; Y10S436/804; Y10S436/815; Y10S436/816; Y10S436/823; Y10S530/00; Y10S530/806
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
An antibody specific to methaqualone and its metabolites prepared by innoculating a host animal with an antigen consisting essentially of a methaqualone hapten having a methaqualone radical bonded to a spacing group through the tolyl ring of said methaqualone radical, said spacing group being selected from the group consisting of an amino carbonylalkylene carboxy, an oxyloweralkylene carboxy and a lower alkylenecarboxy group and having from 2 to 7 carbon atoms in the linking chain, said hapten being covalently bonded to an immunogenic carrier material through the carboxyl group of said spacing group.
Claim 2
Dependent Claim
92 words
An antibody specific to methaqualone and its metabolites prepared by innoculating a host animal with an antigen consisting essentially of a methaqualone hapten having a methaqualone radical bonded to a spacing group through the tolyl ring of said methaqualone radical, said spacing group being selected from the group consisting of an amino carbonylalkylene carboxy, an oxyloweralkylene carboxy and a lower alkylenecarboxy group and having from 2 to 7 carbon atoms in the linking chain, said hapten being covalently bonded to an immunogenic carrier material through the carboxyl group of said spacing group.
Claim 3
Dependent Claim
18 words
The antibody of claim 1 wherein the hapten of said antigen is a N-carbonyl-lower alkylenecarboxyl derivative of 2-methyl-3-(2-methyl-4-aminophenyl)-3,4-dihydro-4-quinazolinone.
Claim 4
Dependent Claim
12 words
The antibody of claim 2 wherein said carbonyl-lower alkylenecarboxyl group is succinyl.
References Cited (Backward Citations)
US3690834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |