US4676796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Middle ear prosthesis
Assignee: FLORIDA UNVERSITY OF
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Filing: 1985-05-24
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Granted: 1987-06-30
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Expires: 2005-05-24
Abstract
Abstract A middle ear prosthesis is constructed of a bio-active bio-compatible glass. The prosthesis includes a substantially disc-like base member, one base surface of which is adapted to bond to the tympanic membrane, and a substantially cylindrical stem member projecting from the other base surface. The axis of the stem member is offset from the center of the base member and perpendicular to the base surface.
Inventors
- 👤 Gerald E. Merwin
- 👤 Derek B. Spilman
- 👤 Larry L. Hench
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:50
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/18; A61L; A61L27/00; A61L27/02; A61L27/12; A61F2002/183; A61F2310/00; A61F2310/00005; A61F2310/00179; A61F2310/00293; A61L2430/00; A61L2430/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
A middle ear prosthesis consisting essentially of a bio-active, bio-compatible glass comprising a substantially disc-like base member, one base surface of which is especially adapted to interface with and bond to the thin collagen layer of the tympanic membrane or grafted tympanic membrane of the middle ear and an integral substantially cylindrical stem member projecting outwardly form the other base surface of said base member, said stem member having a smaller diameter than said base member and the axis of said stem member being off-set with respect to the center of and substantially perpendicular to said base surface.
Claim 2
Dependent Claim
98 words
A middle ear prosthesis consisting essentially of a bio-active, bio-compatible glass comprising a substantially disc-like base member, one base surface of which is especially adapted to interface with and bond to the thin collagen layer of the tympanic membrane or grafted tympanic membrane of the middle ear and an integral substantially cylindrical stem member projecting outwardly form the other base surface of said base member, said stem member having a smaller diameter than said base member and the axis of said stem member being off-set with respect to the center of and substantially perpendicular to said base surface.
Claim 3
Dependent Claim
20 words
The middle ear prosthesis of claim 1 wherein the end of said stem member proximal to said base is flared.
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) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |