Patent US4947866A successfully refreshed from Google Patents.
US4947866A
Expired / Lapsed
US
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Medical electrical lead
Assignee: Medtronic Inc
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Filing: 1989-05-19
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Granted: 1990-08-14
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Expires: 2009-05-19
Abstract
Abstract A medical electrical lead having a polyurethane outer sheath and one or more coiled metal conductors. The metal conductors are optimized for use in conjunction with a polyurethane sheath and are provided with a barrier coating of a biocompatible metal. The conductors may additionally be provided with an outer, insulative coating.
Inventors
- 👤 Joseph F. Lessar
- 👤 Duane L. Rosenberg
- 👤 Robert E. Kraska
- 👤 James M. Speckien
- 👤 James E. Upton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:15
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/20; A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; H; H01; H01B; H01B7/00; H01B7/0009
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A medical electrical lead comprising: an elongated insulative sheath fabricated of a polyether urethane; an elongated coiled conductor, located within said polyether urethane sheath; an electrode coupled to a distal end of said elongated coiled conductor; and an electrical connector coupled to a proximal end of said elongated conductor; and wherein said elongated coiled conductor comprises a coiled wire of a first alloy including cobalt, molybdenum or chromium, provided with a coating of a second metal selected from the group consisting of platinum, titanium, niobium or tantalum.
Claim 2
Dependent Claim
87 words
A medical electrical lead comprising: an elongated insulative sheath fabricated of a polyether urethane; an elongated coiled conductor, located within said polyether urethane sheath; an electrode coupled to a distal end of said elongated coiled conductor; and an electrical connector coupled to a proximal end of said elongated conductor; and wherein said elongated coiled conductor comprises a coiled wire of a first alloy including cobalt, molybdenum or chromium, provided with a coating of a second metal selected from the group consisting of platinum, titanium, niobium or tantalum.
Claim 3
Dependent Claim
20 words
A lead according to claim 1 wherein said coating of said second metal is 200 microns or less in thickness.
Claim 4
Dependent Claim
21 words
A lead according to claim 1 wherein said coating of said second metal is about 500 angstroms or less in thickness.
Claim 5
Dependent Claim
118 words
A medical electrical lead, comprising: a multifilar coil conductor; an elongated insultive sheath encasing said multifilar coil conductor, said insulative sheath fabricated of polyether urethane; and at least one electrode coupled to a distal end of at least one of the filars in said multifilar coil conductor; and wherein said multifilar coil conductor comprises a plurality of wires fabricated from an alloy containing cobalt, molybdenum or chromium, and provided with a coating of a second, bicompatible inert metal selected from the group consisting of titanium, platinum, niobium, tantalum, and alloys thereof, said wires further provided with an outer coating of an insulative material whereby the individual filars of said multifilar coil conductor are electrically insulated from one another.
Claim 6
Dependent Claim
118 words
A medical electrical lead, comprising: a multifilar coil conductor; an elongated insultive sheath encasing said multifilar coil conductor, said insulative sheath fabricated of polyether urethane; and at least one electrode coupled to a distal end of at least one of the filars in said multifilar coil conductor; and wherein said multifilar coil conductor comprises a plurality of wires fabricated from an alloy containing cobalt, molybdenum or chromium, and provided with a coating of a second, bicompatible inert metal selected from the group consisting of titanium, platinum, niobium, tantalum, and alloys thereof, said wires further provided with an outer coating of an insulative material whereby the individual filars of said multifilar coil conductor are electrically insulated from one another.
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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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |