Patent US4205401A successfully refreshed from Google Patents.
US4205401A
Expired / Lapsed
US
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Mammary prosthesis which resists capsular contracture
Assignee: Dow Silicones Corp
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Filing: 1978-05-25
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Granted: 1980-06-03
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Expires: 1998-05-25
Abstract
Abstract A surgically implantable mammary prosthesis comprises a sac containing a filler material. The filler material is present in an amount sufficient to give the sac a relatively low profile shape and a pliant, responsive nature. The prosthesis includes a restraining means for resisting the tendancy of tissue to form the prosthesis into a sphere. The restraining means functions reactive to tissue pressure and does not substantially reduce the pliant, responsive nature of the prosthesis.
Inventors
- 👤 Eldon E. Frisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:33
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
A surgically implantable mammary prosthesis which resists capsular contracture, the prosthesis comprising: (a) a sac containing (b) a filler material in an amount sufficient to give the sac a relatively low profile shape and a pliant, responsive nature over at least its broad surfaces, and (c) ring-shaped restraining means positioned so as to function reactive to tissue pressure to resist the tendency of tissue to form the prosthesis into a sphere without substantially reducing the pliant, responsive nature of the prosthesis.
Claim 2
Dependent Claim
81 words
A surgically implantable mammary prosthesis which resists capsular contracture, the prosthesis comprising: (a) a sac containing (b) a filler material in an amount sufficient to give the sac a relatively low profile shape and a pliant, responsive nature over at least its broad surfaces, and (c) ring-shaped restraining means positioned so as to function reactive to tissue pressure to resist the tendency of tissue to form the prosthesis into a sphere without substantially reducing the pliant, responsive nature of the prosthesis.
Claim 3
Dependent Claim
23 words
The prosthesis of claim 1 wherein the restraining means is capable of resisting a pressure of at least about 5 g/cm 2 .
Claim 4
Dependent Claim
17 words
The prosthesis of claim 1 wherein the restraining means is a tube containing filler material under pressure.
Claim 5
Dependent Claim
13 words
The prosthesis of claim 3 wherein the tube is continuous with the sac.
Claim 6
Dependent Claim
14 words
The prosthesis of claim 3 wherein the tube is loosely positioned within the sac.
Claim 7
Dependent Claim
18 words
The prosthesis of claim 1 wherein the restraining means is a flexible member loosely positioned within the sac.
Claim 8
Dependent Claim
21 words
The prosthesis of claim 1 wherein the restraining means is a plurality of filaments embedded in the walls of the prosthesis.
Claim 9
Dependent Claim
13 words
The prosthesis of claim 1 wherein the sac is formed of silicone rubber.
Claim 10
Dependent Claim
16 words
The prosthesis of claims 1 or 3 wherein the filler material is a silicone elastomer gel.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-03 | 1983-12-03 | 1984-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-03 | 1987-12-03 | 1988-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-03 | 1991-12-03 | 1992-06-03 | $7700.00 | Window Closed / Lapsed |