US4747849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oesophagus prosthesis
Assignee: Individual
•
Filing: 1987-01-13
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Granted: 1988-05-31
•
Expires: 2007-01-13
Abstract
Abstract Implantable prosthesis fulfilling the natural functions of the oesophagus, characterized in that it consists of a double-walled tube of circular cross-section in its midportion and of elliptical cross-section towards its extremities, the exterior wall being made of a relatively rigid hemocompatible synthetic material and the interior wall being made of a flexible hemocompatible synthetic material providing a perfectly smooth internal surface, a helicoidal band of relatively elastic material being inserted between the two walls in the midportion of said tube.
Inventors
- 👤 Claude Galtier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:29
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2002/044; A61F2/30; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2230/00; A61F2230/0063; A61F2230/0069
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
Implantable prosthesis fulfilling the natural functions of the oesophagus, characterized in that it consists of a double-walled tube of circular cross-section in its midportion and of elliptical cross-section towards its extremities, comprising an exterior wall made of a relatively rigid hemocompatible synthetic material and an interior wall made of a flexible hemocompatible synthetic material providing of perfectly smooth internal surface, a helicoidal band of relatively elastic material being inserted between the two walls in the midportion of said tube.
Claim 2
Dependent Claim
79 words
Implantable prosthesis fulfilling the natural functions of the oesophagus, characterized in that it consists of a double-walled tube of circular cross-section in its midportion and of elliptical cross-section towards its extremities, comprising an exterior wall made of a relatively rigid hemocompatible synthetic material and an interior wall made of a flexible hemocompatible synthetic material providing of perfectly smooth internal surface, a helicoidal band of relatively elastic material being inserted between the two walls in the midportion of said tube.
Claim 3
Dependent Claim
14 words
Prosthesis according to claim 1 characterized in that said synthetic material is a polyurethane.
Claim 4
Dependent Claim
50 words
Prosthesis according to claim l, wherein the end portions of the inner and outer tubes provide funnel-like transitions between the cylindrical shape of the middle portions of the respective tubes and an elongated substantially elliptical orifice for the prosthesis of a shape suitable for fluid-tight surgical attachment of living tissue.
Claim 5
Dependent Claim
24 words
Prosthesis according to claim 3, wherein said elliptical orifices of the respective end portions of the prosthesis are elongated in substantially the same plane.
References Cited (Backward Citations)
US3105492A
Cited
SU137632A1
Cited
US3479670A
Cited
US4086665A
Cited
US4130904A
Cited
GB2069339A
Cited
FR2513111A1
Cited
US4403604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |