US4740208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast gel implantable prosthesis
Assignee: Individual
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Filing: 1985-09-27
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Granted: 1988-04-26
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Expires: 2005-09-27
Abstract
Abstract A cast gel elastomer implantable prosthesis for implantation in the human body. The gel prosthesis is formed for subcutaneous implantation and may be subsequently coated with a membrane-thin elastomer so that when it is implanted, it will retain its natural softness after the human tissue capsule forms around the prothesis.
Inventors
- 👤 Joseph F. Cavon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:56
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/34; A61F; A61F2/00; A61F2/02; A61F2/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A non-enveloped prosthesis for implantation in a human body cavity normally substantially occupied by soft tissue consisting essentially of: an unconstrained cohesive molded homogeneous gel elastomer formed to fit the shape and size of a body cavity normally substantially occupied by soft tissue in the human body, said gel having a consistency as measured by a penetrometer of more than 0.5 mm which simulates the natural pressure-dispersing feeling of the body tissue normally occupying said cavity, and being sufficiently cross-linked so that the gel has a non-flowing characteristic.
Claim 2
Dependent Claim
88 words
A non-enveloped prosthesis for implantation in a human body cavity normally substantially occupied by soft tissue consisting essentially of: an unconstrained cohesive molded homogeneous gel elastomer formed to fit the shape and size of a body cavity normally substantially occupied by soft tissue in the human body, said gel having a consistency as measured by a penetrometer of more than 0.5 mm which simulates the natural pressure-dispersing feeling of the body tissue normally occupying said cavity, and being sufficiently cross-linked so that the gel has a non-flowing characteristic.
Claim 3
Dependent Claim
31 words
A prosthesis according to claim 1 wherein said gel form implant is substantially circular and has an ovular cross-sectional shape whereby said gel form may be used as a mammary implant.
Claim 4
Dependent Claim
23 words
A prosthesis according to claim 2, wherein said gel form implant includes integrally attached fixation patches for securing said implant to body tissue.
Claim 5
Dependent Claim
29 words
A prosthesis according to claim 1 wherein said gel form implant has a consistency as measured by a penetrometer in the range of approximately 0.1 mm to 29 mm.
Claim 6
Dependent Claim
12 words
The prosthesis according to claim 1 including a thin integral tackiness-reducing coating.
Claim 7
Independent Claim
139 words
A method of implanting a natural feeling prosthesis in a human body to simulate the texture of human body tissue comprising the steps of: making an incision in the human body at the area where a prosthesis is to be implanted; inserting through said incision to the area of the human body desired, a non-enveloped prosthesis consisting essentially of an unconstrained cohesive molded homogeneous gel elastomer formed to fit the shape and size of a body cavity normally substantially occupied by soft tissue, said gel having a consistency as measured by penetrometer of more than 0.5 mm which simulates the natural pressure-disbursing feeling of the body tissue normally occupying said cavity, and being sufficiently cross linked so that the gel has a non-flowing characteristic; and closing the incision whereby the human body forms a tissue capsule around said prosthesis.
Claim 8
Independent Claim
139 words
A method of implanting a natural feeling prosthesis in a human body to simulate the texture of human body tissue comprising the steps of: making an incision in the human body at the area where a prosthesis is to be implanted; inserting through said incision to the area of the human body desired, a non-enveloped prosthesis consisting essentially of an unconstrained cohesive molded homogeneous gel elastomer formed to fit the shape and size of a body cavity normally substantially occupied by soft tissue, said gel having a consistency as measured by penetrometer of more than 0.5 mm which simulates the natural pressure-disbursing feeling of the body tissue normally occupying said cavity, and being sufficiently cross linked so that the gel has a non-flowing characteristic; and closing the incision whereby the human body forms a tissue capsule around said prosthesis.
Claim 9
Independent Claim
72 words
A method for avoiding post-surgical contracture of breast implants comprising the step of filling a cavity normally occupied by breast tissue with a non-enveloped gel elastomer sized and shaped to fit the cavity, the gel having a consistency as measured by a penetrometer of more than 0.5 mm which simulates the natural pressure dispersing feeling of the tissue normally occupying said cavity, and being sufficiently cross linked to exhibit a non-flowing characteristic.
Claim 10
Independent Claim
72 words
A method for avoiding post-surgical contracture of breast implants comprising the step of filling a cavity normally occupied by breast tissue with a non-enveloped gel elastomer sized and shaped to fit the cavity, the gel having a consistency as measured by a penetrometer of more than 0.5 mm which simulates the natural pressure dispersing feeling of the tissue normally occupying said cavity, and being sufficiently cross linked to exhibit a non-flowing characteristic.
Claim 11
Dependent Claim
20 words
The prosthesis according to claim 5 wherein the tackiness-reducing coating is selected from the group consisting of fluids and elastomers.
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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) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |