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US4432802A
Expired / Lapsed
US
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Inclusion compound-containing composite
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1982-01-27
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Granted: 1984-02-21
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Expires: 2002-01-27
Abstract
Abstract An inclusion compound-containing composite comprises a container formed of a permeable membrane and an inclusion compound holding therein an active component and enclosed with the container. Through the membrane of the container, the composite releases the active component slowly and continuously over a long time.
Inventors
- 👤 Kazuaki Harata
- 👤 Satoshi Morimoto
- 👤 Keishiro Tsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:58
CPC Classifications
B; B82; B82Y; B82Y5/00; C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0012; C08B37/0015; A; A61; A61K; A61K47/00; A61K47/50; A61K47/69; A61K47/6949; A61K47/6951; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
An inclusion compound-containing composite, comprising a closed container formed partially or wholly of permeable membrane and an inclusion compound enclosed by said container, wherein said enclosed inclusion compound consists of a water-soluble cyclodextrin polymer incapable of permeating said membrane and an active component capable of permeating said membrane, whereby the composite releases said active component steadily over a long period of time.
Claim 2
Dependent Claim
62 words
An inclusion compound-containing composite, comprising a closed container formed partially or wholly of permeable membrane and an inclusion compound enclosed by said container, wherein said enclosed inclusion compound consists of a water-soluble cyclodextrin polymer incapable of permeating said membrane and an active component capable of permeating said membrane, whereby the composite releases said active component steadily over a long period of time.
Claim 3
Dependent Claim
43 words
The inclusion compound-containing composite according to claim 1, wherein the cyclodextrin polymer is produced by causing a multiplicity of cyclodextrin molecules to be linked mutually to form a polymer or by causing cyclodextrin molecules to be linked to a high molecular weight compound.
Claim 4
Dependent Claim
28 words
The inclusion compound-containing composite according to claim 1, wherein the permeable membrane is preponderantly selected from the group consisting of cellulose, derivatives of cellulose, polyvinyl alcohols, and polyamides.
Claim 5
Dependent Claim
24 words
The inclusion compound-containing composite according to claim 1, wherein the inclusion compound is enclosed in the form of an aqueous solution in the container.
Claim 6
Dependent Claim
25 words
The inclusion compound-containing composite according to claim 1, wherein the inclusion compound is enclosed in the form of a solid or powder in the container.
Claim 7
Dependent Claim
20 words
The inclusion compound-containing composite according to claim 1, wherein the cyclodextrin polymer has a molecular weight of at least 10,000.
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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |