Patent US4292425A successfully refreshed from Google Patents.
US4292425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
βGalactosyl-umbelliferone valproic acid conjugates
Assignee: Bayer Corp
•
Filing: 1980-04-14
•
Granted: 1981-09-29
•
Expires: 2000-04-14
Abstract
Abstract Reagents for use in binding assays, particularly immunoassays, to determine valproic acid in liquid media such as serum. Such reagents include antibody to valproic acid and beta -galactosyl-umbelliferone-valproic acid conjugates. Also provided are compounds used to prepare such reagents, including valproic acid immunogen conjugates and intermediates in the synthesis of such immunogen conjugates and beta -galactosyl-umbelliferone-labeled conjugates.
Inventors
- 👤 Robert T. Buckler
- 👤 John F. Burd
- 👤 Raphael C. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:04
CPC Classifications
C; C07; C07K; C07K16/00; C07K16/44; C07H; C07H17/00; C07H17/04; C07H17/06; C07H17/065; C07H17/07; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/94; G01N33/9473
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
17 words
A β-galactosyl-umbelliferone-valproic acid conjugate of the formula: ##STR6## wherein n is an integer from 3 through 8.
Claim 2
Dependent Claim
17 words
A β-galactosyl-umbelliferone-valproic acid conjugate of the formula: ##STR6## wherein n is an integer from 3 through 8.
Claim 3
Dependent Claim
7 words
The conjugate of claim 1 wherein n=4.
References Cited (Backward Citations)
US4226978A
Cited
US4238389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |