Patent US5408744A successfully refreshed from Google Patents.
US5408744A
Expired / Lapsed
US
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Substrate for a sintered electrode
Assignee: Medtronic Inc
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Filing: 1993-04-30
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Granted: 1995-04-25
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Expires: 2013-04-30
Abstract
Abstract A substrate for use in a pacing lead having a sintered porous platinized steroid eluting electrode. The substrate has at least one raised surface which provides an advantageous mounting portion for the sintered electrode. In the preferred embodiment the mounting portion is nailhead-shaped. The present invention provides an electrode produced with increased dimensional consistency, mechanical strength and impedance as compared to electrodes having a straight wire substrate. Also disclosed is a method of manufacturing such an electrode.
Inventors
- 👤 James T. Gates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:59
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61N1/0565; A61N1/0568; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49206; Y10T29/49224
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
114 words
A method of manufacturing an electrode for a lead used to stimulate and sense a body comprising the steps of: forming a raised surface on a distal end of a conductive stem; preparing a slurry mixture containing at least one conductive material; introducing at least a portion of said raised surface of said conductive stem into said slurry mixture; withdrawing said portion of said raised surface of said conductive stem from said slurry mixture such that a portion of said slurry mixture envelopes said raised portion of said conductive stem and covers said distal end of said substrate in a non-uniform thickness; and sintering said portion of said slurry mixture enveloping said raised surface.
Claim 2
Independent Claim
114 words
A method of manufacturing an electrode for a lead used to stimulate and sense a body comprising the steps of: forming a raised surface on a distal end of a conductive stem; preparing a slurry mixture containing at least one conductive material; introducing at least a portion of said raised surface of said conductive stem into said slurry mixture; withdrawing said portion of said raised surface of said conductive stem from said slurry mixture such that a portion of said slurry mixture envelopes said raised portion of said conductive stem and covers said distal end of said substrate in a non-uniform thickness; and sintering said portion of said slurry mixture enveloping said raised surface.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein said forming said raised surface on a distal end of a conductive stem comprises deforming with heat said distal end of said conductive stem.
Claim 4
Dependent Claim
19 words
The method of claim 2 wherein said deforming with heat comprises melting said distal end of said conductive stem.
Claim 5
Dependent Claim
29 words
The method of claim 1 wherein said forming said raised surface on said distal end of said conductive stem comprises mechanically deforming said distal end of said conductive stem.
Claim 6
Dependent Claim
35 words
The method of claim 1 wherein said conductive material is from the class of materials consisting essentially of platinum, palladium, titanium, tantalum, rhodium, iridium, carbon, vitreous carbon and alloys, oxides or nitrides of such metals.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein said raised surface comprises a nailhead-shaped configuration.
Claim 8
Dependent Claim
16 words
The method of claim 1 wherein said mixture comprises a slurry containing at least one binder.
Claim 9
Independent Claim
148 words
A method of manufacturing an electrode for a lead used to stimulate and sense a body comprising the steps of: providing a cylindrical conductive stem having a first diameter; forming a raised surface on a distal end of the conductive stem, the raised surface having a second diameter, the second diameter being greater than the first diameter; preparing a mixture containing at least one conductive material; introducing at least a portion of the raised surface of the conductive stem into the mixture; withdrawing the portion of the raised surface of the conductive stem from the mixture such that a portion of the mixture envelopes the raised portion of the conductive stem, the portion of the mixture enveloping the raised portion of the conductive stem having a third diameter, the third diameter being greater than the second diameter; and sintering the portion of the mixture enveloping the raised surface.
Claim 10
Independent Claim
148 words
A method of manufacturing an electrode for a lead used to stimulate and sense a body comprising the steps of: providing a cylindrical conductive stem having a first diameter; forming a raised surface on a distal end of the conductive stem, the raised surface having a second diameter, the second diameter being greater than the first diameter; preparing a mixture containing at least one conductive material; introducing at least a portion of the raised surface of the conductive stem into the mixture; withdrawing the portion of the raised surface of the conductive stem from the mixture such that a portion of the mixture envelopes the raised portion of the conductive stem, the portion of the mixture enveloping the raised portion of the conductive stem having a third diameter, the third diameter being greater than the second diameter; and sintering the portion of the mixture enveloping the raised surface.
Claim 11
Dependent Claim
26 words
The method of claim 8 the portion of the mixture enveloping the raised portion of the conductive stem envelopes the raised portion in a non-uniform thickness.
Claim 12
Independent Claim
164 words
A method of manufacturing an electrode for a lead used to stimulate and sense a body comprising the steps of: providing a conductive stem having a first diameter; forming a raised surface at a distal end of the conductive stem, the raised surface having a second diameter, the second diameter being equal to or greater than the first diameter; preparing a mixture containing at least one conductive material; introducing at least a portion of the raised surface of the conductive stem into the mixture; withdrawing the portion of the raised surface of the conductive stem from the mixture such that a portion of the mixture envelopes the raised portion of the conductive stem, the portion of the mixture enveloping the raised portion of the conductive stem having a third diameter, the third diameter being greater than the second diameter, the mixture enveloping the raised portion of the conductive stem in a non-uniform thickness; and sintering the portion of the mixture enveloping the raised surface.
Claim 13
Independent Claim
164 words
A method of manufacturing an electrode for a lead used to stimulate and sense a body comprising the steps of: providing a conductive stem having a first diameter; forming a raised surface at a distal end of the conductive stem, the raised surface having a second diameter, the second diameter being equal to or greater than the first diameter; preparing a mixture containing at least one conductive material; introducing at least a portion of the raised surface of the conductive stem into the mixture; withdrawing the portion of the raised surface of the conductive stem from the mixture such that a portion of the mixture envelopes the raised portion of the conductive stem, the portion of the mixture enveloping the raised portion of the conductive stem having a third diameter, the third diameter being greater than the second diameter, the mixture enveloping the raised portion of the conductive stem in a non-uniform thickness; and sintering the portion of the mixture enveloping the raised surface.
Claim 14
Independent Claim
32 words
The method of either claims 8 or 10 wherein the forming the raised surface on the distal end of the conductive stem comprises mechanically deforming the distal end of the conductive stem.
Claim 15
Independent Claim
38 words
The method of either claims 8 or 10 wherein the conductive material is from the class of materials consisting essentially of platinum, palladium, titanium, tantalum, rhodium, iridium, carbon, vitreous carbon and alloys, oxides or nitrides of such metals.
Claim 16
Independent Claim
19 words
The method of either claims 8 or 10 wherein the mixture comprises a slurry containing at least one binder.
Claim 17
Independent Claim
22 words
The method of either claims 8 or 10 wherein the mixture comprises a fluidized bed of the conductive material and a gas.
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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) | 1998-04-24 | 1998-10-24 | 1999-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-24 | 2002-10-24 | 2003-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-24 | 2006-10-24 | 2007-04-25 | $7700.00 | Window Closed / Lapsed |