US5567495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infection resistant medical devices
Assignee: Columbia University
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Filing: 1994-07-11
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Granted: 1996-10-22
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Expires: 2014-07-11
Abstract
Abstract The present invention provides for medical devices which are antiinfective as a result of antiinfective agents impregnated onto their surfaces and/or antiinfective activity incorporated into their access sites. It is based, at least in part, on the discovery that certain combinations of antimicrobial agents and solvents change the surface characteristics of polymeric medical devices, thereby facilitating the retention of antimicrobial agents. It is further based on the discovery that the incorporation of antiinfective polymeric inserts into the access site of a medical device provides substantially improved antiinfective activity.
Inventors
- 👤 Shanta Modak
- 👤 Lester Sampath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:44
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/14; A61L29/16; A61M; A61M25/00; A61M25/0017; A61L2300/00; A61L2300/10; A61L2300/102; A61L2300/104; A61L2300/20; A61L2300/204; A61L2300/206; A61L2300/40; A61L2300/404; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/1393; Y10T428/1397
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
43 words
An injection port comprising an antiinfective insert selected from the group consisting of an antiinfective disc and an antiinfective ring, wherein the antiinfective disc or antiifective ring is comprised of a ploymer which has been impregnated, at its surface, with an antiifective agent.
Claim 2
Dependent Claim
43 words
An injection port comprising an antiinfective insert selected from the group consisting of an antiinfective disc and an antiinfective ring, wherein the antiinfective disc or antiifective ring is comprised of a ploymer which has been impregnated, at its surface, with an antiifective agent.
Claim 3
Dependent Claim
16 words
The injection port of claim 1, in which the antiinfective insert is an antiifective Dacron disc.
Claim 4
Dependent Claim
16 words
The injection port of claim 1, in which the antiifective insert in an antiifective polyurethane disc.
Claim 5
Dependent Claim
20 words
The injection port of claim 2, in which the antiinfective Dacron disc comprises chlorhexidine or a pharmaceutically acceptable salt thereof.
Claim 6
Dependent Claim
15 words
The injection port of claim 3, in which the antiinfective polyurethane disc comprises silver sulfadiazine.
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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) | 1999-10-22 | 2000-04-22 | 2000-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-22 | 2004-04-22 | 2004-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-22 | 2008-04-22 | 2008-10-22 | $7700.00 | Window Closed / Lapsed |