US5092348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textured tissue expander
Assignee: APPALOOSA MANAGEMENT LP
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Filing: 1990-03-28
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Granted: 1992-03-03
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Expires: 2010-03-28
Abstract
Abstract An implantable tissue expansion device with an external surface layer of silicon elastomer, at least a portion of which contains a texture or open cell sturcture. The textured surface is expected to decrease subsequent capsular contracture and provide a non-skid surface to hold the device in position and permit differential expansion.
Inventors
- 👤 Will R. Dubrul
- 👤 G. Patrick Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:20
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/12; A61B; A61B90/00; A61B90/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
An improved tissue expansion device for temporary surgical implantation beneath the skin and for removal upon predetermined expansion of the overlying tissue, the device comprising an expandable biocompatible envelope forming an expandable fluid-tight chamber, an injection reservoir in fluid communication with the chamber, the injection reservoir comprising means for injecting fluid into the chamber from a hypodermic needle which punctures the injection reservoir, and said envelope having a textured outer surface over at least a portion of said envelope.
Claim 2
Dependent Claim
79 words
An improved tissue expansion device for temporary surgical implantation beneath the skin and for removal upon predetermined expansion of the overlying tissue, the device comprising an expandable biocompatible envelope forming an expandable fluid-tight chamber, an injection reservoir in fluid communication with the chamber, the injection reservoir comprising means for injecting fluid into the chamber from a hypodermic needle which punctures the injection reservoir, and said envelope having a textured outer surface over at least a portion of said envelope.
Claim 3
Dependent Claim
14 words
The improvement of claim 1 wherein the textured surface is of an open-celled configuration.
Claim 4
Dependent Claim
46 words
A tissue expander for temporary implantation, comprising an expandable outer shell enclosing an expandable lumen for temporary implantation beneath the skin thereafter to be inflated to stretch and expand the overlying tissue, and at least a portion of the outer surface of said shell being textured.
Claim 5
Dependent Claim
46 words
A tissue expander for temporary implantation, comprising an expandable outer shell enclosing an expandable lumen for temporary implantation beneath the skin thereafter to be inflated to stretch and expand the overlying tissue, and at least a portion of the outer surface of said shell being textured.
References Cited (Backward Citations)
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US3852832A
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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) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |