US5116361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonated polyethyleneoxide-substituted polymers with improved blood compatibility
Assignee: Korea Institute of Science and Technology
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Filing: 1990-06-07
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Granted: 1992-05-26
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Expires: 2010-06-07
Abstract
Abstract Novel sulfonated polyethyleneoxide-substituted polymers having improved blood compatibility are provided. The polymers are produced by substituting a polymeric substrate having active sites of amide or acid amide group, such as polyurethane, polyamide and polyacrylamide, with sulfonated polyethyleneoxide PEO-SO 3 H. The polymers according to the present invention are valuable as construction materials of the artificial organs for the circulatory system in contact with blood, such as artificial hearts, artificial blood vessels, artificial kidneys, etc.
Inventors
- 👤 Young-Ha Kim
- 👤 Seo-Young Jeong
- 👤 Kwang-Duk Ahn
- 👤 Dong-Keun Han
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:23
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/49; A; A61; A61L; A61L33/00; A61L33/0076; A61L33/0082; A61L33/06; A61L33/068; B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0093; B01D67/00931; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0828; C08G18/10; C08G18/83; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/32; C08G65/329; C08G65/334; C08G65/3344
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
27 words
A modified polymeric material having improved blood compatibility, comprising a polymeric substrate having sulfonated polyethylene oxide groups substituted for amide or acid amide groups of said substrate.
Claim 2
Dependent Claim
27 words
A modified polymeric material having improved blood compatibility, comprising a polymeric substrate having sulfonated polyethylene oxide groups substituted for amide or acid amide groups of said substrate.
Claim 3
Dependent Claim
24 words
The modified polymeric material of claim 1, wherein said polymeric substrate is selected from the group consisting of polyurethane, polyamide, polyacrylamide, and copolymers thereof.
Claim 4
Dependent Claim
34 words
The modified polymeric material of claim 1, wherein the substitution degree of the sulfonated polyethyleneoxide is 5-50% in the case of a bulk reaction and 50-95% in the case of a surface reaction, respectively.
Claim 5
Dependent Claim
26 words
A construction material of medical devices or instruments for use in contact with blood, comprising the modified polymeric material of any of claims 1 to 3.
Claim 6
Dependent Claim
15 words
An artificial heart comprising the modified polymeric material of any of claims 1 to 3.
Claim 7
Dependent Claim
16 words
An artificial blood vessel comprising the modified polymeric material of any of claims 1 to 3.
Claim 8
Dependent Claim
16 words
An artificial heart valve comprising the modified polymeric material of any of claims 1 to 3.
Claim 9
Dependent Claim
16 words
An artificial blood oxygenater comprising the modified polymeric material of any of claims 1 to 3.
Claim 10
Dependent Claim
15 words
An artificial kidney comprising the modified polymeric material of any of claims 1 to 3.
Claim 11
Dependent Claim
16 words
A blood vessel catheter comprising the modified polymeric material of any of claims 1 to 3.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |