Patent US4569673A successfully refreshed from Google Patents.
US4569673A
Expired / Lapsed
US
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Bacterial barrier for indwelling catheters and other medical devices
Assignee: BRIDGE BLOOD TECHNOLOGIES NEW YORK LLC LLC
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Filing: 1984-01-12
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Granted: 1986-02-11
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Expires: 2004-01-12
Abstract
Abstract A novel bacterial barrier for medical devices is disclosed comprising a strip or band of oligodynamic metal connected to another conductor generally connected in open circuit to a power cell and producing a strategic circumferential zone of bacterial inhibition when the medical device is installed.
Inventors
- 👤 Julius M. Tesi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:59
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/20; A61N1/30; A61N1/303; A61N1/306; A61L; A61L29/00; A61L29/14; A61L29/16; A61L2300/00; A61L2300/10; A61L2300/102; A61L2300/104; A61L2300/40; A61L2300/404
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
96 words
A bacterial barrier for medical devices comprising: a thin, flexible nonconductive substrate; an electric power cell; a continuous strip of an oligodynamic metal on the substrate; a conductive material on the substrate separated from the oligodynamic metal; the oligodynamic metal and conductive material being connected to oxidizing and reducing poles respectively of the electric power cell such that an open circuit is formed which circuit is closed by body fluids when the medical device with bacterial barrier is installed in a patient and such that the oligodynamic metal is oxidized forming ions of the oligodynamic metal.
Claim 2
Dependent Claim
96 words
A bacterial barrier for medical devices comprising: a thin, flexible nonconductive substrate; an electric power cell; a continuous strip of an oligodynamic metal on the substrate; a conductive material on the substrate separated from the oligodynamic metal; the oligodynamic metal and conductive material being connected to oxidizing and reducing poles respectively of the electric power cell such that an open circuit is formed which circuit is closed by body fluids when the medical device with bacterial barrier is installed in a patient and such that the oligodynamic metal is oxidized forming ions of the oligodynamic metal.
Claim 3
Dependent Claim
29 words
The bacterial barrier according to claim 1 wherein said conductive material on the substrate is a continuous strip of conductive material substantially parallel to the strip of oligodynamic metal.
Claim 4
Dependent Claim
19 words
The bacterial barrier according to claim 1 wherein said oligodynamic metal is selected from silver, copper, aluminum or zinc.
Claim 5
Dependent Claim
18 words
The bacterial barrier according to claim 1 wherein said power cell is an electrochemical cell or solar cell.
Claim 6
Dependent Claim
26 words
The bacterial barrier according to claim 1 wherein said conductive material is a metal more noble than the oligodynamic metal or of substantially similar ionization potential.
Claim 7
Dependent Claim
47 words
The bacterial barrier according to claim 1 wherein the medical device is a catheter, the substrate is an outside wall of the catheter, and the bacterial barrier is positioned around the outside circumference of said catheter such that a continuous band of the oligodynamic metal is formed.
Claim 8
Dependent Claim
28 words
The bacterial barrier according to claim 6 wherein the bacterial barrier is positioned on the catheter to be just within the urethral orifice when the catheter is installed.
Claim 9
Dependent Claim
107 words
An improved medical device for shunting body fluids having a bacterial barrier around the outside circumference thereof comprising: a nonconductive substrate; at least one band of an oligodynamic metal on the substrate; an electric power cell; a conductive material on the substrate separated from the oligodynamic metal; the oligodynamic metal and conductive material being connected to oxidizing and reducing poles respectively of the electric power cell such that an open circuit is formed which circuit is closed by body fluids when the medical device with bacterial barrier is installed in a patient and such that the oligodynamic metal band is oxidized forming ions of the oligodynamic metal.
Claim 10
Dependent Claim
107 words
An improved medical device for shunting body fluids having a bacterial barrier around the outside circumference thereof comprising: a nonconductive substrate; at least one band of an oligodynamic metal on the substrate; an electric power cell; a conductive material on the substrate separated from the oligodynamic metal; the oligodynamic metal and conductive material being connected to oxidizing and reducing poles respectively of the electric power cell such that an open circuit is formed which circuit is closed by body fluids when the medical device with bacterial barrier is installed in a patient and such that the oligodynamic metal band is oxidized forming ions of the oligodynamic metal.
Claim 11
Dependent Claim
26 words
The device according to claim 8 wherein said conductive material is on the substrate and is a band substantially parallel to the band of oligodynamic metal.
Claim 12
Dependent Claim
26 words
The device according to claim 8 wherein the medical device is selected from the group consisting of a catheter, an intraveneous needle, and a vascular shunt.
Claim 13
Dependent Claim
25 words
The device according to claim 8 wherein said conductive material is a metal more noble than the oligodynamic metal or of substantially similar ionization potential.
Claim 14
Dependent Claim
22 words
The device according to claim 8 wherein said oligodynamic metal is selected from the group consisting of silver, copper, aluminum, and zinc.
Claim 15
Dependent Claim
17 words
The device according to claim 8 wherein said power cell is an electrochemical cell or solar cell.
Claim 16
Dependent Claim
20 words
The device according to claim 8 comprising in addition on electrolytic gel connecting the oligodynamic metal and the conductive metal.
Claim 17
Dependent Claim
22 words
The device according to claim 14 wherein said oligodynamic metal is selected from the group consisting of silver, copper, aluminum or zinc.
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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) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |