Patent US20150148731A1 successfully refreshed from Google Patents.
US3808606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone implant with porous exterior surface
Assignee: Individual
•
Filing: 1973-03-19
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Granted: 1974-05-07
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Expires: 1993-03-19
Abstract
Abstract A bone implant for vertebrates, including humans and animals in veterinary surgery such as hip prosthesis or a bone implant into the jaw in dental surgery, having a solid surface adapted to be in contact with the growing bone, said surfaces having at the outside at least a depth of 100 microns and preferably of 1/8 inch of 20 to 50%, preferably 30 to 40%, and most desirably about 33% of the pore area. The pores are divided between small, intermediate and large pores and the area of each is between 20 and 40% of the total pore area, preferably 30 to 36% and most desirably about 33%. The small pores range in size between 50 and 200 microns in diameter, preferably 75 to 100 microns and most desirably about 100 microns. The intermediate pores range in size from about 200 to 800 microns. The large pores range in size from above 800 to 3,500 microns.
Inventors
- 👤 R Tronzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:15
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/002; A; A61; A61C; A61C8/00; A61C8/0012; A61C8/0013; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10T; Y10T428/00; Y10T428/12; Y10T428/12479; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
A vertebrate bone implant having solid surfaces adapted to be held in contact with growing bone, said surfaces having at the outside frOm 20 to 50% pore area, at least 100 microns in depth, of pores between 20 and 40% of the surface pore area being small pores between 50 and 200 microns diameter, between 20 and 40% of the surface pore area being intermediate pores between about 200 and 800 microns in diameter and between 20 and 40% of the surface pore area being large pores exceeding 800 and not exceeding 3,500 microns in diameter.
Claim 2
Dependent Claim
96 words
A vertebrate bone implant having solid surfaces adapted to be held in contact with growing bone, said surfaces having at the outside frOm 20 to 50% pore area, at least 100 microns in depth, of pores between 20 and 40% of the surface pore area being small pores between 50 and 200 microns diameter, between 20 and 40% of the surface pore area being intermediate pores between about 200 and 800 microns in diameter and between 20 and 40% of the surface pore area being large pores exceeding 800 and not exceeding 3,500 microns in diameter.
Claim 3
Dependent Claim
15 words
A bone implant of claim 1, in which the porous layer is 1/16 inch thick.
Claim 4
Dependent Claim
18 words
A bone implant of claim 2, in which the porous layer is at least 1/8 inch in depth.
Claim 5
Dependent Claim
19 words
A bone implant of claim 1, in which from 30 to 40% of the outside surface is pore area.
Claim 6
Dependent Claim
16 words
A bone implant of claim 1, in which about 33% of the surface is pore area.
Claim 7
Dependent Claim
40 words
A bone implant of claim 4, in which between 30 and 36% of the pore surface is small pores, between 30 and 36% of the surface is intermediate pores and between 30 and 36% of the surface is large pores.
Claim 8
Dependent Claim
33 words
A bone implant of claim 5, in which about 33% of the surface is small pores, about 33% of the surface is intermediate pores and about 33% of the surface is large pores.
Claim 9
Dependent Claim
16 words
A bone implant of claim 2, in which about 33% of the surface is pore area.
Claim 10
Dependent Claim
45 words
A bone implant of claim 1, in which about 30 to 36% of the outside pore area is small pores, about 30 to 36% of the outside pore area is intermediate pores and about 30 to 36% of the outside pore area is large pores.
Claim 11
Dependent Claim
25 words
A bone implant of claim 1, in which the surfaces adapted to be in contact with the growing bone are of a stainless steel alloy.
Claim 12
Dependent Claim
25 words
A bone implant of claim 1, in which the surfaces adapted to be in contact with the growing bone are a cobalt chromium molybdenum alloy.
References Cited (Backward Citations)
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US3076453A
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US3314420A
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US3466670A
Cited
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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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |