Patent US5848995A successfully refreshed from Google Patents.
US5848995A
Expired / Lapsed
US
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Anti-infective medical article and method for its preparation
Assignee: Becton Dickinson and Co
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Filing: 1993-04-09
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Granted: 1998-12-15
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Expires: 2013-04-09
Abstract
Abstract An anti-infective medical article comprises a hydrophilic polymer having silver chloride bulk distributed therein. The hydrophilic polymer containing silver chloride may be a laminate over a base polymer. A method for making the article includes contacting the hydrophilic polymer with a solution of a soluble silver salt followed by a solution of a soluble chloride to give silver chloride bulk distributed throughout the polymer matrix. The polymer containing silver chloride may then be melt processed, such as by extruding or coextruding with the base polymer.
Inventors
- 👤 Anthony J. Walder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:23
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/14; A61L31/16; A61L27/00; A61L27/50; A61L27/54; A61L29/00; A61L29/08; A61L29/085; A61L29/14; A61L29/16; A61L2300/00; A61L2300/10; A61L2300/102; A61L2300/104; A61L2300/40; A61L2300/404; A61L2300/60; A61L2300/606; A61L2300/608; A61M; A61M25/00; A61M25/0043; A61M2025/0056; A61M25/0017
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
28 words
An anti-infective medical article comprising a hydrophilic polymer having an insoluble silver salt bulk distributed therein, said polymer having a water absorption of 5% or more by weight.
Claim 2
Dependent Claim
28 words
An anti-infective medical article comprising a hydrophilic polymer having an insoluble silver salt bulk distributed therein, said polymer having a water absorption of 5% or more by weight.
Claim 3
Dependent Claim
44 words
An anti-infective medical article comprising a first polymer and a layer of a second polymer laminated thereon, said second polymer being hydrophilic and having an insoluble silver salt bulk distributed therein, said second polymer having a water absorption of 5% or more by weight.
Claim 4
Dependent Claim
44 words
An anti-infective medical article comprising a first polymer and a layer of a second polymer laminated thereon, said second polymer being hydrophilic and having an insoluble silver salt bulk distributed therein, said second polymer having a water absorption of 5% or more by weight.
Claim 5
Dependent Claim
21 words
The article of claim 2 wherein said first polymer is selected from the group consisting of polyurethane, polyolefin and polyvinyl chloride.
Claim 6
Dependent Claim
28 words
The article of claim 2 wherein said second polymer is selected from the group consisting of polyurethane, polyvinyl alcohol-polyvinyl acetate copolymer, polymethylmethacrylate-acrylic acid copolymer and 2-hydroxyethyl acrylate-polymethylmethacrylate copolymer.
Claim 7
Dependent Claim
9 words
The article of claim 2 which is a tubing.
Claim 8
Dependent Claim
39 words
An anti-infective medical tubing comprising a first polyurethane and a layer of a second polyurethane laminated thereon, said second polyurethane being hydrophilic, having a water absorption of 5% or more by weight and having silver chloride bulk distributed therein.
Claim 9
Dependent Claim
39 words
An anti-infective medical tubing comprising a first polyurethane and a layer of a second polyurethane laminated thereon, said second polyurethane being hydrophilic, having a water absorption of 5% or more by weight and having silver chloride bulk distributed therein.
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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) | 2001-12-14 | 2002-06-15 | 2002-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-14 | 2006-06-15 | 2006-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-14 | 2010-06-15 | 2010-12-15 | $7700.00 | Window Closed / Lapsed |