US4598070A
Expired / Lapsed
US
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Tripamide and cyclodextrin inclusion compound
Assignee: Eisai Co Ltd
•
Filing: 1984-07-18
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Granted: 1986-07-01
•
Expires: 2004-07-18
Abstract
Abstract An inclusion compound composed of tripamide and cyclodextrin markedly improves the solubility of tripamide which is effective for treatment of essential hypertension.
Inventors
- 👤 Takayuki Ohwaki
- 👤 Shigeru Sakashita
- 👤 Masahiro Kawahara
- 👤 Aishin Shinoda
- 👤 Yasuo Miyake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:40
CPC Classifications
B; B82; B82Y; B82Y5/00; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/40; A61K47/00; A61K47/50; A61K47/69; A61K47/6949; A61K47/6951; C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0012; C08B37/0015
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
An inclusion compound composed of tripamide represented by formula: ##STR2## and from 1.0 to 3 moles cyclodextrin per mole of tripamide.
Claim 2
Dependent Claim
21 words
An inclusion compound composed of tripamide represented by formula: ##STR2## and from 1.0 to 3 moles cyclodextrin per mole of tripamide.
Claim 3
Dependent Claim
16 words
The inclusion compound as claimed in claim 1 wherein the cyclodextrin is α-cyclodextrin, β-cyclodextrin or γ-cyclodextrin.
Claim 4
Dependent Claim
25 words
An inclusion compound according to claim 1 in which the cyclodextrin is present in an amount of 2 to 3 moles per mole of tripamide.
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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |