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US4939007A
Expired / Lapsed
US
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Article having a hemocompatible surface
Assignee: Becton Dickinson and Co
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Filing: 1988-03-07
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Granted: 1990-07-03
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Expires: 2008-03-07
Abstract
Abstract An article has a blood-contacting hemocompatible surface layer of a urethane-siloxane copolymer on a thermoplastic polymeric base material. The copolymer has siloxane segments prepared from hydroxyalkyl terminated polysiloxane glycols. The article is prepared by coextrusion of the base material and the copolymer.
Inventors
- 👤 Can B. Hu
- 👤 Donald D. Solomon
- 👤 Stanley C. Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/61; A; A61; A61L; A61L33/00; A61L33/06; A61L33/068; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/29; Y10T428/2913; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31565; Y10T428/31573; Y10T428/31598
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
40 words
An article having a hemocompatible surface comprising a thermoplastic polymeric base material having thereon a layer of a copolymer comprising a polyurethane segment and a hydroxyalkyl-terminated siloxane segment said layer being from 5 to 50% by weight of said material.
Claim 2
Dependent Claim
40 words
An article having a hemocompatible surface comprising a thermoplastic polymeric base material having thereon a layer of a copolymer comprising a polyurethane segment and a hydroxyalkyl-terminated siloxane segment said layer being from 5 to 50% by weight of said material.
Claim 3
Dependent Claim
21 words
The article of claim 1 wherein said base material is selected from the group consisting of polyurethane, polyolefin, polyester and polyurethaneurea.
Claim 4
Dependent Claim
17 words
The article of claim 2 wherein said polyurethane has a Shore hardness of about 50A to 75D.
Claim 5
Dependent Claim
13 words
The article of claim 1 which is in the form of a tubing.
Claim 6
Dependent Claim
13 words
The article of claim 1 which is in the form of a fiber.
Claim 7
Dependent Claim
13 words
The article of claim 1 which is in the form of a sheet.
Claim 8
Dependent Claim
13 words
The article of claim 1 which is in the form of a film.
Claim 9
Dependent Claim
49 words
An article having a hemocompatible surface comprising a thermoplastic polyurethane base material of Shore hardness about 40A to 75D having thereon a layer of a copolymer comprising a polyurethane segment and a hydroxyalkyl- terminated polydimethyl siloxane segment said layer being from 5 to 50% by weight of said material.
Claim 10
Dependent Claim
49 words
An article having a hemocompatible surface comprising a thermoplastic polyurethane base material of Shore hardness about 40A to 75D having thereon a layer of a copolymer comprising a polyurethane segment and a hydroxyalkyl- terminated polydimethyl siloxane segment said layer being from 5 to 50% by weight of said material.
Claim 11
Dependent Claim
9 words
The article of claim 8 which is a catheter.
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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) | 1993-07-02 | 1994-01-01 | 1994-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |