Patent US2489998A successfully refreshed from Google Patents.
US3662405A
Expired / Lapsed
US
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Reinforced porous ceramic bone prosthesis
Assignee: IIT Research Institute
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Filing: 1969-03-12
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Granted: 1972-05-16
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Expires: 1989-03-12
Abstract
Abstract A structural member having a core of porous material permitting fluid flow and an outer layer of composite material having rigid matrix with reinforcing material embedded therein. The member finds its primary use in prosthetics.
Inventors
- 👤 Seymour A Bortz
- 👤 Harold L Rechter
- 👤 William E Reynolds
- 👤 Seymour Bazell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:50
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/3094; A61F2/30965; A61F2002/2825; A61F2002/30001; A61F2002/30667; A61F2002/30673; A61F2310/00; A61F2310/00005; A61F2310/00179
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
The prosthesis defined in claim 1 in which said reinforcing material comprises stainless steel filaments.
Claim 2
Dependent Claim
125 words
A prosthesis for human bone comprising a composite material of a predetermined configuration, said composite material comprising a ceramic matrix material and elongated reinforcing material, said reinforcing material and said matrix material being adapted to withstand contemplated tensile and bending forces applied to said prosthesis, and a porous ceramic material attached to said composite material at at least one extremity of said prosthesis, said porous material being adapted to act as a lubricable joint, said porous material forming a central core for said prosthesis and extending through the prosthesis to each surface of said prosthesis where a joint structure is desired whereby a receptacle is provided for retention and circulation of lubricants to the joint, all of said material being chemically inert to body fluids.
References Cited (Backward Citations)
US448745A
Cited
US2210424A
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US2679245A
Cited
FR1122634A
Cited
US3314420A
Cited
FR1500461A
Cited
US3462765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |