US4950256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-thrombogenic intravascular time release catheter
Assignee: Luther Medical Products Inc
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Filing: 1990-01-11
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Granted: 1990-08-21
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Expires: 2010-01-11
Abstract
Abstract An intravascular catheter comprising a cannula for insertion into a vascular system of a patient coated with hydrophilic polymer containing, in the polymer, an effective amount of polymyxin to prevent the growth of microorganisms is disclosed.
Inventors
- 👤 Ronald B. Luther
- 👤 Edward Shanbrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:23
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/14; A61L29/16; A61L33/00; A61L33/0005; A61L33/0011; A61L33/0041; A61L2300/00; A61L2300/40; A61L2300/404; A61L2300/406; A61L2300/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
An invasive device comprising a structure constructed and dimensioned for insertion into a patient for residing in contact with a fluid in the patient which contains fibrinogen-fibrin capable of forming clots, and a coating on the structure, said coating consisting essentially of three-dimensional polymer formed of polyurethane polyene compositions obtained by reacting from about 10 to about 50 parts by weight of a polyene in the presence of about 100 parts by weight of a hydrophilic polyurethane resin, said coating having absorbed therein an amount of antimicrobial anticoagulant consisting essentially of polymyxin in amount effective to inhibit growth of bacteria and the formation of blood clots on said coating.
Claim 2
Dependent Claim
109 words
An invasive device comprising a structure constructed and dimensioned for insertion into a patient for residing in contact with a fluid in the patient which contains fibrinogen-fibrin capable of forming clots, and a coating on the structure, said coating consisting essentially of three-dimensional polymer formed of polyurethane polyene compositions obtained by reacting from about 10 to about 50 parts by weight of a polyene in the presence of about 100 parts by weight of a hydrophilic polyurethane resin, said coating having absorbed therein an amount of antimicrobial anticoagulant consisting essentially of polymyxin in amount effective to inhibit growth of bacteria and the formation of blood clots on said coating.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |