Patent US5354329A successfully refreshed from Google Patents.
US5354329A
Expired / Lapsed
US
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Vascular prosthesis having enhanced compatibility and compliance characteristics
Assignee: Whalen Biomedical Inc
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Filing: 1993-08-31
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Granted: 1994-10-11
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Expires: 2013-08-31
Abstract
Abstract A method and apparatus for manufacturing a circulatory system non-pyrogenic vascular prosthesis comprising a multilaminar tubular member comprising an interior strata, a unitary medial strata and an exterior strata. The interior strata bears a pseudoneointima facilitating lumen surface and the exterior strata bears a stabilization promoter surface. The interior and exterior stratum being separated solely by said unitary medial strata which comprises an exclusionary boundary.
Inventors
- 👤 Robert L. Whalen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:38
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
A circulatory system non-pyrogenic vascular prosthesis having variable radial elasticity, which prosthesis comprises: a multilaminar tubular member comprising an interior stratum, a unitary medial stratum having an internal and external diameter, and an exterior stratum wherein said interior stratum bears a pseudoneointima-facilitating lumen surface; said exterior stratum bears a stabilization promoter surface; said interior and exterior strata being separated solely by said unitary medial stratum; said unitary medial stratum being a solid, non-porous, non-communicative exclusionary boundary which prohibits communication between the pseudoneointima-facilitating lumen surface and the stabilization promoter surface and which has a thickness that can vary such that said internal diameter varies while said external diameter remains constant; said variable radial elasticity varying inversely with the thickness of said unitary medial stratum.
Claim 2
Dependent Claim
123 words
A circulatory system non-pyrogenic vascular prosthesis having variable radial elasticity, which prosthesis comprises: a multilaminar tubular member comprising an interior stratum, a unitary medial stratum having an internal and external diameter, and an exterior stratum wherein said interior stratum bears a pseudoneointima-facilitating lumen surface; said exterior stratum bears a stabilization promoter surface; said interior and exterior strata being separated solely by said unitary medial stratum; said unitary medial stratum being a solid, non-porous, non-communicative exclusionary boundary which prohibits communication between the pseudoneointima-facilitating lumen surface and the stabilization promoter surface and which has a thickness that can vary such that said internal diameter varies while said external diameter remains constant; said variable radial elasticity varying inversely with the thickness of said unitary medial stratum.
Claim 3
Dependent Claim
17 words
A circulatory system vascular prosthesis according to claim 1 wherein the interior stratum comprises textured porous material.
Claim 4
Dependent Claim
17 words
A circulatory system vascular prosthesis according to claim 1 wherein the exterior stratum comprises textured porous material.
Claim 5
Dependent Claim
24 words
A circulatory system vascular prosthesis according to claim 1 wherein the interior stratum has thinner walls and smaller pore size than the exterior stratum.
Claim 6
Dependent Claim
29 words
A circulatory system vascular prosthesis according to claim 1 wherein the interior, medial and exterior strata are fabricated from a single, biostable material entirely without the use of adhesives.
Claim 7
Dependent Claim
51 words
A circulatory system vascular prosthesis according to claim 1 wherein the interior stratum has a thickness of approximately 300μ and a surface porosity in the range of 90μ to 170μ and the exterior stratum has a thickness of approximately 400μ and a surface porosity in the range of 170μ to 220μ.
Claim 8
Dependent Claim
21 words
A circulatory system vascular prosthesis according to claim 1 wherein the interior, medial and exterior strata are composed of silicone rubber.
Claim 9
Dependent Claim
26 words
A circulatory system vascular prosthesis according to claim 7 wherein the unitary medial stratum has a thickness in the range of 0.5 mm to 0.75 mm.
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) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |