US4014971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a tympanic membrane prosthesis
Assignee: Individual
•
Filing: 1973-05-11
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Granted: 1977-03-29
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Expires: 1993-05-11
Abstract
Abstract Synthetic anatomical members, such as a tympanic membrane and a malleus, are illustrated and a method for making them is disclosed. In accordance with the method, prepared collagenous tissue is placed in a mold and immersed in, or sprayed with, a buffered formaldehyde or functionally similar preservative. After removal from the mold, the tissue retains the shape assumed in the mold. Provisions are made for attaching other anatomical members, such as bone, to the tissue for use in, for example, en bloc reconstruction of an eardrum and ossicles.
Inventors
- 👤 Rodney C. Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:36
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/36; A61L27/3683; A61F; A61F2/00; A61F2/02; A61F2/18; A61F2002/183
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A method of making a biosynthetic tympanic membrane and a biosynthetic tympanic membraneossicular substitute having a concave and a convex surface, comprising the steps of: making a mold having the shape of a natural tympanic membrane; preparing collagenous tissue for placement on said mold; placing said tissue on said mold and shaping said tissue thereon; treating said tissue with buffered formaldehyde, gluteraldehyde or another functionally similar fixative agent on said mold for causing said tissue to retain the external shape of said mold upon removal from said mold; forming a prosthetic receiving means of collagenous material on a surface of said tissue for receiving natural and prosthetic ossicle members; and removing said treated tissue from said mold.
Claim 2
Independent Claim
117 words
A method of making a biosynthetic tympanic membrane and a biosynthetic tympanic membraneossicular substitute having a concave and a convex surface, comprising the steps of: making a mold having the shape of a natural tympanic membrane; preparing collagenous tissue for placement on said mold; placing said tissue on said mold and shaping said tissue thereon; treating said tissue with buffered formaldehyde, gluteraldehyde or another functionally similar fixative agent on said mold for causing said tissue to retain the external shape of said mold upon removal from said mold; forming a prosthetic receiving means of collagenous material on a surface of said tissue for receiving natural and prosthetic ossicle members; and removing said treated tissue from said mold.
Claim 3
Dependent Claim
23 words
A method according to claim 1 wherein said step of forming a prosthetic receiving means comprises forming a strap on said convex surface.
Claim 4
Dependent Claim
23 words
A method according to claim 1 wherein said step of forming a prosthetic receiving means comprises forming a pouch on said convex surface.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |