Patent US4007494A successfully refreshed from Google Patents.
US4007494A
Expired / Lapsed
US
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Bone cap
Assignee: Steinel GmbH and Co KG
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Filing: 1975-04-11
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Granted: 1977-02-15
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Expires: 1995-04-11
Abstract
Abstract A cap for covering the exposed end of an excised bone including a head adapted to abut the exposed end. The outer surface of the head is free from sharp corners, at least the portion of the head adjacent to the exposed bone end being interspersed with a network of interconnected pores adapted for human tissue to grow therein and anchor the cap to the bone. The cap further includes means for preventing the pores from communicating with the outer surface of the head.
Inventors
- 👤 Barry W. Sauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:46
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/2814; A61B; A61B17/00; A61B17/56; A61B17/58; A61L; A61L27/00; A61L27/14; A61L27/16; A61F2/30; A61F2/30767; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2/30771; A61F2002/30878; A61F2002/3092; A61F2230/00; A61F2230/0063; A61F2230/0069
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
An improved cap for covering the stump of a partially amputated bone, and preventing bone overgrowth in juveniles, comprising a head adapted to abut and overlap the end of the stump, the outer surface of the head being free from sharp corners, at least the portion of the head adjacent to said end of the stump with a thickness of at least 1 mm. being formed of a porous polymeric material with a density of at least 0.912 g./c.c. interspersed with a network throughout its volume of interconnected pores with no straight paths longer than the diameter of the largest pore and adapted for human tissue to grow therein, said porous polymeric material having an average pore diameter ranging from 50μm - 300μm , the minimum pore volume being 30%, a non-porous cover on the portion of the outer surface of the head which projects beyond the end of the stump for preventing the pores from communicating with said portion of the outer surface.
Claim 2
Dependent Claim
164 words
An improved cap for covering the stump of a partially amputated bone, and preventing bone overgrowth in juveniles, comprising a head adapted to abut and overlap the end of the stump, the outer surface of the head being free from sharp corners, at least the portion of the head adjacent to said end of the stump with a thickness of at least 1 mm. being formed of a porous polymeric material with a density of at least 0.912 g./c.c. interspersed with a network throughout its volume of interconnected pores with no straight paths longer than the diameter of the largest pore and adapted for human tissue to grow therein, said porous polymeric material having an average pore diameter ranging from 50μm - 300μm , the minimum pore volume being 30%, a non-porous cover on the portion of the outer surface of the head which projects beyond the end of the stump for preventing the pores from communicating with said portion of the outer surface.
Claim 3
Dependent Claim
22 words
The cap in claim 1, wherein the head includes a stem projecting from the side thereof adapted to abut said exposed end.
Claim 4
Dependent Claim
13 words
The cap in claim 2, wherein the stem includes an axial opening therein.
Claim 5
Dependent Claim
15 words
The cap in claim 1, wherein the cap is formed substantially entirely of porous HDPE.
References Cited (Backward Citations)
US2679245A
Cited
FR1046920A
Cited
FR1107877A
Cited
GB764600A
Cited
US3314420A
Cited
US3879767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |