US3843696A
Expired / Lapsed
US
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Methadone analog compounds
Assignee: Syva Co
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Filing: 1972-09-05
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Granted: 1974-10-22
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Expires: 1992-09-05
Abstract
Abstract Methadone derivatives are provided for use in preparing reagents for immunoassays and for preparing antibodies to methadone. A carboxy group is bonded through an aliphatic chain to a group which conforms to a substantial portion of methadone. Accurate and selective immunoassays are obtained by employing a modified methadone derivatized detector with the antibodies prepared to the methadone analog.
Inventors
- 👤 D Wagner
- 👤 E Ullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:05
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/94; G01N33/9486; C; C07; C07D; C07D207/00; C07D207/46; Y; Y10; Y10S; Y10S436/00; Y10S436/815; Y10S436/816; Y10S436/822; Y10S436/823; Y10S530/00; Y10S530/806
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
12 words
A compound according to claim 1 wherein R2 is straight chain hydrocarbon.
Claim 4
Dependent Claim
5 words
A compound of the formula:
Claim 5
Dependent Claim
5 words
A compound of the formula:
Claim 6
Dependent Claim
11 words
A compound according to claim 3 as the mineral acid salt.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |