Patent US4028401A successfully refreshed from Google Patents.
US4028401A
Expired / Lapsed
US
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(Substituted)ureidoacetohydroxamic acids
Assignee: ATK Launch Systems LLC
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Filing: 1976-07-01
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Granted: 1977-06-07
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Expires: 1996-07-01
Abstract
Abstract A series of (substituted)ureidoacetohydroxamic acids are useful as inhibitors of Angiotensin I converting enzyme.
Inventors
- 👤 Dyral C. Fessler
- 👤 George A. Heavner
- 👤 Thomas H. Massey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:30
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/04; C07C275/06; C07C275/16; A; A61; A61P; A61P9/00; A61P9/12; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
23 words
A compound of the formula: ##STR2## wherein R is isobutyl, hydrogen, methyl, benzyl, 4-aminobutyl or hexyl and R 1 is hydrogen or benzyl.
Claim 2
Dependent Claim
23 words
A compound of the formula: ##STR2## wherein R is isobutyl, hydrogen, methyl, benzyl, 4-aminobutyl or hexyl and R 1 is hydrogen or benzyl.
Claim 3
Dependent Claim
7 words
The compound N,[N 1 -(N 2 -hydroxycarbamoylmethyl)carbamoyl]-DL-leucine.
Claim 4
Dependent Claim
7 words
The compound N,[N 1 -(N 2 -hydroxycarbamoylmethyl)carbamoyl]-DL-leucine.
Claim 5
Dependent Claim
5 words
The compound N,N'-carbonyl-glycine-glycine hydroxamic acid.
Claim 6
Dependent Claim
5 words
The compound N,N'-carbonyl-glycine-glycine hydroxamic acid.
Claim 7
Dependent Claim
4 words
The compound N,N'-carbonyl-DL-alanine-glycine-hydroxamic acid.
Claim 8
Dependent Claim
4 words
The compound N,N'-carbonyl-DL-alanine-glycine-hydroxamic acid.
Claim 9
Dependent Claim
5 words
The compound N,N'-carbonyl-DL-phenylalanine-glycine hydroxamic acid.
Claim 10
Dependent Claim
5 words
The compound N,N'-carbonyl-DL-phenylalanine-glycine hydroxamic acid.
Claim 11
Dependent Claim
5 words
The compound N,N'-carbonyl-L-alanine-glycine hydroxamic acid.
Claim 12
Dependent Claim
5 words
The compound N,N'-carbonyl-L-alanine-glycine hydroxamic acid.
Claim 13
Dependent Claim
5 words
The compound N,N'-carbonyl-L-lysine-glycine hydroxamic acid.
Claim 14
Dependent Claim
5 words
The compound N,N'-carbonyl-L-lysine-glycine hydroxamic acid.
Claim 15
Dependent Claim
6 words
The compound N,N'-carbonyl-DL-α-amino-caprylic acid-glycine hydroxamic acid.
Claim 16
Dependent Claim
6 words
The compound N,N'-carbonyl-DL-α-amino-caprylic acid-glycine hydroxamic acid.
Claim 17
Dependent Claim
4 words
The compound N,N'-carbonyl-L-alanine-L-phenylalanine-hydroxamic acid.
Claim 18
Dependent Claim
4 words
The compound N,N'-carbonyl-L-alanine-L-phenylalanine-hydroxamic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |