US4425336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3,4-Dihydroxy-N-[3-(4-dihydroxyphenyl)-1-methyl-n-propyl]-beta-phenethylamine cyclodextrin complexes
Assignee: Key Pharmaceuticals Inc
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Filing: 1982-05-24
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Granted: 1984-01-10
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Expires: 2002-05-24
Abstract
Abstract Cardiac contractility agents are provided which are 3,4-dihydroxy-N-[3-(4-hydroxyphenyl)-1-methyl-n-propyl]-beta-phenethyl amine cyclodextrin complexes.
Inventors
- 👤 Ronald R. Tuttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:33
CPC Classifications
B; B82; B82Y; B82Y5/00; A; A61; A61K; A61K47/00; A61K47/50; A61K47/69; A61K47/6949; A61K47/6951; A61K31/00; A61K31/13; A61K31/135; A61K31/70; A61K31/715; C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0012; C08B37/0015
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
A complex of 3,4-di-hydroxy-N-[3-(4-hydroxyphenyl)-1-methyl-n-propyl]-beta-phenethylamine and at least one mole cyclodextrin per mol 3,4-di-hydroxy-N-[3-(4-hydroxyphenyl)-1-methyl-n-propyl]-beta-phenethylamine.
Claim 2
Dependent Claim
13 words
A complex of 3,4-di-hydroxy-N-[3-(4-hydroxyphenyl)-1-methyl-n-propyl]-beta-phenethylamine and at least one mole cyclodextrin per mol 3,4-di-hydroxy-N-[3-(4-hydroxyphenyl)-1-methyl-n-propyl]-beta-phenethylamine.
Claim 3
Dependent Claim
13 words
A complex of claim 1 wherein the cyclodextrin is in the beta form.
Claim 4
Dependent Claim
19 words
A complex of claim 1 or 2 wherein about two molecules of cyclodextrin are present per molecule of 3,4-dihydroxy-N-[3-(4-hydroxyphenyl)-1-methyl-n-propyl]-beta-phenethylamine.
References Cited (Backward Citations)
US3987200A
Cited
US4228160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |