US5032129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Active implant
Assignee: KSB PARTNERSHIP
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Filing: 1986-11-18
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Granted: 1991-07-16
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Expires: 2006-11-18
Abstract
Abstract The active implant for use in medicine, such as for tooth implants or endoprosthesis For positions influencing the growth mechanisms of the bone and which remain in place for a long time. The active implant comprises a base and flexible structures therein provided with an oxide which contains growth stimulators and has a stable p-n junction.
Inventors
- 👤 Peter Kurze
- 👤 Waldemar Krysmann
- 👤 Wolfram Knoefler
- 👤 Hans-Ludwig Graf
- 👤 Wolfgang Bethmann
- 👤 Horst Hampel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:56
CPC Classifications
A; A61; A61M; A61M31/00; A61M31/002; A61C; A61C8/00; A61C8/0012; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; A61L27/50; A61L27/54; A61F2/28; A61F2002/2821; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30087; A61F2002/30108; A61F2002/30199; A61F2002/30289; A61F2/3094; A61F2002/30968; A61F2230/00; A61F2230/0063; A61F2230/0091; A61L2300/00; A61L2300/10; A61L2300/102
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
An active medical implant, comprising: a base body; and means exhibiting piezoelectric behavior in both stressed and unstressed states to generate a deformation potential resulting in the flow of stimulus current in said implant for permanent stimulation of bone and tissue growth, said means comprising a flexible structure having a stable p-n junction made of a material selected from the group consisting of metal, ceramic, wire, foil and mixtures thereof, and an oxide layer on said base body and flexible structure, said oxide layer containing piezoelectrically active growth stimulators and being derived from said base body and flexible structure by anodic oxidation of said base body and flexible structure under spark discharge in an electrolyte, said flexible structure being sintered to said base body as a result of said anodic oxidation.
Claim 2
Dependent Claim
131 words
An active medical implant, comprising: a base body; and means exhibiting piezoelectric behavior in both stressed and unstressed states to generate a deformation potential resulting in the flow of stimulus current in said implant for permanent stimulation of bone and tissue growth, said means comprising a flexible structure having a stable p-n junction made of a material selected from the group consisting of metal, ceramic, wire, foil and mixtures thereof, and an oxide layer on said base body and flexible structure, said oxide layer containing piezoelectrically active growth stimulators and being derived from said base body and flexible structure by anodic oxidation of said base body and flexible structure under spark discharge in an electrolyte, said flexible structure being sintered to said base body as a result of said anodic oxidation.
Claim 3
Dependent Claim
29 words
An implant as in claim 1, wherein said base body and flexible structure are selected from the group consisting of Ti, Ta, Nb, Al, Zr, Hf and mixtures thereof.
Claim 4
Dependent Claim
27 words
An implant as in claim 1, wherein said growth stimulators are selected from the group consisting of dihydrogen phosphates, zirconates, tartrates, titanates, tourmalines, quartzes and mixtures thereof.
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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) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |