US4209459A
Expired / Lapsed
US
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Novel L-leucyl-4-hydroxyanilide derivatives
Assignee: Nitto Boseki Co Ltd
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Filing: 1979-05-04
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Granted: 1980-06-24
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Expires: 1999-05-04
Abstract
Abstract Novel L-leucyl-4-hydroxyanilide derivatives of the formula, <IMAGE> wherein R represents a carboxyl group or a sulfo group or an acid addition salt thereof, which are useful for assay of leucine-aminopeptidase activity.
Inventors
- 👤 Takeshi Nagasawa
- 👤 Katsumasa Kuroiwa
- 👤 Tadami Akatsuka
- 👤 Osamu Kodama
- 👤 Mitoshi Shimamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:56
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/34; C12Q1/37; C12Q2337/00; C12Q2337/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
An L-leucyl-4-hydroxyanilide derivative represented by the general formula, ##STR6## (wherein R represents a carboxyl group or a sulfo group) or an acid addition salt thereof.
Claim 2
Dependent Claim
25 words
An L-leucyl-4-hydroxyanilide derivative represented by the general formula, ##STR6## (wherein R represents a carboxyl group or a sulfo group) or an acid addition salt thereof.
Claim 3
Dependent Claim
12 words
A compound according to claim 1, wherein R is a carboxyl group.
Claim 4
Dependent Claim
12 words
A compound according to claim 1, wherein R is a sulfo group.
References Cited (Backward Citations)
US3340298A
Cited
US4049702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |