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US4965112A
Expired / Lapsed
US
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Method for applying a blood-compatible coating to polyether-urethane moulded articles and the polymether-urethane moulded articles coated in this way
Assignee: Technology Foundation STW
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Filing: 1989-03-01
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Granted: 1990-10-23
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Expires: 2009-03-01
Abstract
Abstract The invention relates to a method for applying a blood-compatible polyethlene oxide coating to polyether-urethane moulded articles like catheters, for instance oxygen sensor catheters. The so obtained blood-compatible articles may advantageously be used in the case of long-term contact with blood or body tissue.
Inventors
- 👤 Egbert Brinkman
- 👤 Adriaan Bantjes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:45
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/08; A61L29/085; A61L33/00; A61L33/06; A61L33/068; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/056; C08J2375/00; C08J2375/04; C08J2375/08; C08J2471/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/1393; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2935; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
56 words
Method for applying a blood-compatible coating to a polyether-urethane moulded article, characterized in that a layer of polyethylene oxide with a weight average molecular weight in the range of 1,500-1,500,000 is applied to the polyether-urethane moulded article using heat treatment or irradiation and the polyethylene oxide layer applied is then linked to the polyethylene-urethane moulded article.
Claim 2
Dependent Claim
56 words
Method for applying a blood-compatible coating to a polyether-urethane moulded article, characterized in that a layer of polyethylene oxide with a weight average molecular weight in the range of 1,500-1,500,000 is applied to the polyether-urethane moulded article using heat treatment or irradiation and the polyethylene oxide layer applied is then linked to the polyethylene-urethane moulded article.
Claim 3
Dependent Claim
21 words
Method according to claim 1, characterized in that polyethylene oxide with a molecular weight in the range of 100,000-300,000 is used.
Claim 4
Dependent Claim
25 words
Method according to claim 1 or 2, characterized in that the linking is carried out thermally at a temperature in the range of 80-180° C.
Claim 5
Dependent Claim
23 words
Method according to claim 3, characterized in that the linking is carried out thermally at a temperature in the range of 100-150° C.
Claim 6
Dependent Claim
58 words
Method according to claim 3 or 4, characterized in that the linking is carried out in the presence of an organic peroxide of the formula R--O--O--R', in which R and R' independently of one another represent an alkyl group with 4-10 carbon atoms, a cycloalkyl group with 5-8 carbon atoms or an alkaryl group with 6-10 carbon atoms.
Claim 7
Dependent Claim
19 words
Method according to claim 5, characterized in that the linking is carried out in the presence of dicumyl peroxide.
Claim 8
Dependent Claim
21 words
Method according to claim 1 or 2, characterized in that the linking is carried out with the use of UV light.
Claim 9
Dependent Claim
25 words
Method according to claim 7, characterized in that the linking is carried out with the use of UV light in the range of 240-300 nm.
Claim 10
Dependent Claim
58 words
Method according to claim 7 or 8, characterized in that the linking is carried out in the presence of an organic peroxide of the formula R--O--O--R', in which R and R' independently of one another represent an alkyl group with 4-10 carbon atoms, a cycloalkyl group with 5-8 carbon atoms or an alkaryl group with 6-10 carbon atoms.
Claim 11
Dependent Claim
19 words
Method according to claim 9, characterized in that the linking is carried out in the presence of dicumyl peroxide.
Claim 12
Dependent Claim
25 words
Polyether-urethane moulded article, such as a catheter, provided with a polyethylene oxide coating applied in accordance with the method according to one of claims 1-10.
References Cited (Backward Citations)
US4743258A
Cited
WO1986002087A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |