US4440178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implantable electrode
Assignee: P R E C I M E D SA 17 CHEMIN DES TOURELLES LE LOCLE SWITZERLAND A Co
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Filing: 1981-12-23
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Granted: 1984-04-03
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Expires: 2001-12-23
Abstract
Abstract A porous electrode, particularly a cardiac pacemaker electrode is described which is implantable in organic tissue. The electrode has a sintered member made of electrically conductive particles. In a portion of the electrode surface the particles are covered wtih a material of lower electrical conductivity than that of the particles. Another portion of the surface is coated with a metal inert to body fluids. Suitable materials for the particles are metals or alloys from the group containing tantalum, titanium, mobium, zirconium as well as cobalt-chromium-based alloys.
Inventors
- 👤 Adrien Bussard
- 👤 Fritz Aldinger
- 👤 Franz Sperner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:00
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
84 words
A porous electrode for implanting in organic tissue, comprising a sintered member of electrically conductive particles, said member having (i) a first surface portion of said sintered particles which is anodized at least at the non-interconnected area of the particles so as to form a relatively thin metal oxide coating on said surface portion and (ii) a second surface portion coated with an electrically conductive metal inert to body fluids, said two surface portions being configured and adapted for intimate contact with the tissue.
Claim 2
Dependent Claim
84 words
A porous electrode for implanting in organic tissue, comprising a sintered member of electrically conductive particles, said member having (i) a first surface portion of said sintered particles which is anodized at least at the non-interconnected area of the particles so as to form a relatively thin metal oxide coating on said surface portion and (ii) a second surface portion coated with an electrically conductive metal inert to body fluids, said two surface portions being configured and adapted for intimate contact with the tissue.
Claim 3
Dependent Claim
14 words
The electrode of claim 1 wherein the electrode is configured as a pacemaker electrode.
Claim 4
Dependent Claim
17 words
The electrode of claim 2 wherein the particles are tantalum, titanium, niobium, zirconium or a cobalt-chromium-based alloy.
Claim 5
Dependent Claim
10 words
The electrode of claim 3 wherein the particles are tantalum.
Claim 6
Dependent Claim
11 words
The electrode of claim 4 wherein the coating is anodized tantalum.
Claim 7
Dependent Claim
16 words
The electrode of claim 5 wherein said electrically conductive metal inert to body fluids is platinum.
Claim 8
Dependent Claim
28 words
The electrode of claim 6 wherein at least the first surface portion of the sintered member has pores of a diameter between about 10 and about 50 μm.
Claim 9
Dependent Claim
33 words
The electrode of claim 2 wherein said electrically conductive metal inert to body fluids is platium, iridium or a platinum-iridium alloy having an iridium content of about 0 to about 20% by weight.
Claim 10
Dependent Claim
41 words
The electrode of claim 2 wherein the electrode is configured and and dimensioned in the shape of a cup having an inner wall, an outer wall and a base member, said base member configured for connection to an electrical power source.
Claim 11
Dependent Claim
25 words
The electrode of claim 8 wherein the inner wall of the cup shape electrode is coated with said electrically conductive metal inert to body fluids.
Claim 12
Dependent Claim
21 words
The electrode of claim 10 wherein the cup shape electrode defines at least one passage through the outer and inner wall.
Claim 13
Dependent Claim
20 words
The electrode of claim 11 wherein said passage has on its surface said electrically conductive metal inert to body fluids.
Claim 14
Dependent Claim
96 words
A porous pacemaker electrode for implanting in organic tissue comprising a sintered member made of electrically conductive sintered tantalum particles and having a surface area with pores of a diameter between about 10 and about 50 μm, said surface area having a first surface portion of anodized tantalum and a second surface portion of platinum for enhancing electrical contact with the tissue for stimulation thereof, said sintered member configured and dimensioned as a cup having an inner wall of anodized tantalum, an outer wall and a base member for effecting contacting with an electric power supply.
Claim 15
Dependent Claim
96 words
A porous pacemaker electrode for implanting in organic tissue comprising a sintered member made of electrically conductive sintered tantalum particles and having a surface area with pores of a diameter between about 10 and about 50 μm, said surface area having a first surface portion of anodized tantalum and a second surface portion of platinum for enhancing electrical contact with the tissue for stimulation thereof, said sintered member configured and dimensioned as a cup having an inner wall of anodized tantalum, an outer wall and a base member for effecting contacting with an electric power supply.
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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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |