Patent US4643715A successfully refreshed from Google Patents.
US4643715A
Expired / Lapsed
US
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Artificial organ and method for manufacture thereof
Assignee: Asahi Kasei Medical Co Ltd
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Filing: 1986-06-24
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Granted: 1987-02-17
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Expires: 2006-06-24
Abstract
Abstract Medical permeating membranes in a zone through which a body fluid flows, said membranes having lateral surfaces in said zone, comprising permeable membranes of regenerated cellulose and a film of a fat-soluble vitamin and glycerin on said lateral surfaces of said membranes in said zone for flow of body fluid.
Inventors
- 👤 Keinosuke Isono
- 👤 Keiji Naoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:36
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0088; B01D63/00; B01D63/02; B01D63/021; B01D63/0233; B01D65/00; B01D65/02; B01D65/022; B01D2321/00; B01D2321/32
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
54 words
Medical permeating membranes at least portions of which are adopted to be in a zone through which a body fluid flows, said membranes having lateral surfaces adopted to be in said zone, comprising permeable membranes of regenerated cellulose and a film of a fat-soluble vitamin and glycerin on said lateral surfaces of said membranes.
Claim 2
Dependent Claim
54 words
Medical permeating membranes at least portions of which are adopted to be in a zone through which a body fluid flows, said membranes having lateral surfaces adopted to be in said zone, comprising permeable membranes of regenerated cellulose and a film of a fat-soluble vitamin and glycerin on said lateral surfaces of said membranes.
Claim 3
Dependent Claim
54 words
The medical permeating membranes according to claim 1, wherein said film contains said fat-soluble vitamin in an amount of not less than 0.1 mg per m 2 of said permeable membranes of regenerated cellulose and glycerin in an amount of at least 0.5% based on the weight of said permeable membranes of regenerated cellulose.
Claim 4
Dependent Claim
33 words
The medical permeating membranes according to claim 2, wherein said fat-soluble vitamin is at least one member selected from the group consisting of vitamin A, vitamin D, vitamin E, vitamin K and uviquinone.
Claim 5
Dependent Claim
20 words
The medical permeating membranes according to claim 1, wherein said permeable membranes of regenerated cellulose are hollow fiber type membranes.
Claim 6
Dependent Claim
33 words
The medical permeating membranes according to claim 2, wherein said fat-soluble vitamin is at least one member selected from the group consisting of vitamin A, vitamin D, vitamin E, vitamin K and uviquinone.
Claim 7
Dependent Claim
20 words
The medical permeating membranes according to claim 5, wherein said permeable membranes of regenerated cellulose are hollow fiber type membranes.
Claim 8
Dependent Claim
20 words
The medical permeating membranes according to claim 2, wherein said permeable membranes of regenerated cellulose are hollow fiber type membranes.
Claim 9
Dependent Claim
20 words
The medical permeating membranes according to claim 3, wherein said permeable membranes of regenerated cellulose are hollow fiber type membranes.
Claim 10
Dependent Claim
15 words
The medical permeating membranes according to claim 6, wherein said fat-soluble vitamin is vitamin A.
Claim 11
Dependent Claim
15 words
The medical permeating membranes according to claim 6, wherein said fat-soluble vitamin is vitamin D.
Claim 12
Dependent Claim
15 words
The medical permeating membranes according to claim 6, wherein said fat-soluble vitamin is vitamin E.
Claim 13
Dependent Claim
15 words
The medical permeating membranes according to claim 6, wherein said fat-soluble vitamin is vitamin K.
Claim 14
Dependent Claim
14 words
The medical permeating membranes according to claim 6, wherein said fat-soluble vitamin is uviquinone.
References Cited (Backward Citations)
US4211602A
Cited
US4354933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |