Patent US2040640A successfully refreshed from Google Patents.
US4287616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auditory ossicle prosthesis
Assignee: Friatec AG
•
Filing: 1980-02-06
•
Granted: 1981-09-08
•
Expires: 2000-02-06
Abstract
Abstract An auditory ossicle prosthesis comprises a grooved plate and a depending shaft integrally formed as a one-piece construction from a biologically inert ceramic material, provided with a hole extending through the plate and along the interior of the shaft to reduce the amount of material to be removed by grinding when the device is fitted to the patient.
Inventors
- 👤 Gunther Heimke
- 👤 Dietrich Plester
- 👤 Klaus Jahnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:01
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/18; A61F2002/183
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
43 words
Auditory ossicle prosthesis comprising a rigid plate and a depending tubular shaft formed integrally as a one-piece construction from a biologically inert ceramic material, the surface of the plate on the side away from the shaft being provided with a plurality of grooves.
Claim 2
Dependent Claim
43 words
Auditory ossicle prosthesis comprising a rigid plate and a depending tubular shaft formed integrally as a one-piece construction from a biologically inert ceramic material, the surface of the plate on the side away from the shaft being provided with a plurality of grooves.
Claim 3
Dependent Claim
52 words
Prosthesis according to claim 1, wherein the axis of the shaft is inclined at an angle of approximately 30° with respect to the grooved surface of the plate, and the grooves are parallel with a plane passing through the axis of the shaft and normal to the plane of the gooved surface.
Claim 4
Dependent Claim
22 words
Prosthesis according to either one of claims 1 or 2, wherein the cross-section of said shaft is uniform along its entire length.
Claim 5
Dependent Claim
31 words
Prosthesis according to either one of claims 1 or 2, wherein said ceramic material comprises alumina ceramic having an Al 2 O 3 content of at least 99.0 percent by weight.
Claim 6
Dependent Claim
26 words
Prosthesis according to claim 3, wherein said ceramic material comprises alumina ceramic having an Al 2 O 3 content of at least 99.0 percent by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |