US4764168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tympanic membrane implant
Assignee: Safety Fund National Bank
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Filing: 1987-08-28
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Granted: 1988-08-16
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Expires: 2007-08-28
Abstract
Abstract The application discloses a Tympanic Membrane Implant used for equalizing pressure and allowing drainage in patients who have fluid build-up and pressure in the middle ear. The Tympanic Membrane Implant is a rigid tube, having flanges at a critical angle to one end of the tube and a tapered portion at said end of the tube for easy surgical insertion. It can contain rigid flanges at the opposite end. The invention overcomes the problem of difficulty of insertion, an inability to retrieve rigid tubes when it is desired, and the propensity of rigid tubes to be easily rejected by the body. It also overcomes the damaging effect and production of scars by the implant on the tympanic membrane.
Inventors
- 👤 Ku W. Suh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:07
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/20; A61F11/202
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A Tympanic Membrane Implant which comprises a rigid tubular body, the cross sectional area of which is at most 2.1 square mm and no less than 1.4 mm square mm, and from about 2.0 to 3.5 mm in length and is rigid; at one end, the insertion end, of said tubular body are affixed at least two flanges which are soft and the same end has a tapered protruding edge for ease of insertion; said flanges are at an angle to the tubular body of from 90 degrees to about 110 degrees.
Claim 2
Dependent Claim
92 words
A Tympanic Membrane Implant which comprises a rigid tubular body, the cross sectional area of which is at most 2.1 square mm and no less than 1.4 mm square mm, and from about 2.0 to 3.5 mm in length and is rigid; at one end, the insertion end, of said tubular body are affixed at least two flanges which are soft and the same end has a tapered protruding edge for ease of insertion; said flanges are at an angle to the tubular body of from 90 degrees to about 110 degrees.
Claim 3
Dependent Claim
38 words
A Tympanic Membrane Implant according to claim 1 which also contains flanges at the end opposite to the insertion end, the following end, and said flanges on the following end are rigid and number from two to five.
Claim 4
Dependent Claim
24 words
A Tympanic Membrane Implant according to claim 1 where the tubular body has a wall thickness of from about 0.18 mm to 0.30 mm.
Claim 5
Dependent Claim
38 words
A Tympanic Membrane Implant acording to claim 3 where the cross sectional area is oval, the flange-tubular wall intersection on the insertion end is from 0.08 to 0.10 mm, and the overall length is at most 3.5 mm.
Claim 6
Dependent Claim
16 words
A Tympanic Membrane Implant according to claim 1 whose cross sectional area is circular or oval.
Claim 7
Dependent Claim
41 words
A Tympanic Membrane Implant according to claim 1 whose cross section is oval in shape and complys with the microscopic arrangement of fibers of the tympanic membrane, containing flexible flanges on the insertion end and rigid flanges on the following end.
References Cited (Backward Citations)
US3807409A
Cited
US3871380A
Cited
US3982545A
Cited
US4015607A
Cited
US4168697A
Cited
US4174716A
Cited
US4650488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |