Patent US3855638A successfully refreshed from Google Patents.
US3855638A
Expired / Lapsed
US
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Surgical prosthetic device with porous metal coating
Assignee: Ortech Corp
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Filing: 1973-05-16
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Granted: 1974-12-24
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Expires: 1993-05-16
Abstract
Abstract A novel surgical prosthetic device having many useful surgical applications comprises a composite structure. The composite consists of a solid metallic material substrate and a porous coating adhered to and extending at least partially over the surface of the substrate. The porous coating has certain critical characteristics, and the individual values depend on the end use to which the device is put. There are described a number of surgical and dental applications.
Inventors
- 👤 R Pilliar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:25
CPC Classifications
C; C23; C23C; C23C24/00; C23C24/08; C23C24/082; C23C24/085; C23C24/087; A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/32; A61F2/36; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; B; B22; B22F; B22F7/00; B22F7/002; A61F2/08; A61F2/0811; A61F2/28; A61F2/2875; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30011; A61F2002/30769; A61F2/3094; A61F2002/30968; A61F2250/00; A61F2250/0014; A61F2250/0023; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00389; A61F2310/00395; A61F2310/00401; A61F2310/00407; A61F2310/00413
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
147 words
A SURGICAL PROSTHETIC DEVICE COMPRISING A COMPOSITE STRUCTURE CONSISTING OF A SOLID METALLIC MATERIAL SUBSTRATE AND A POROUS COATING OF SAID METALLIC MATERIAL ADHERD TO AND EXTENDING AT LEAST PARTIALLY OVER THE SURFACE OF SAID SUBSTRATE TO A THICKNESS OF ABOUT 100 MICRONS TO ABOUT 1,000 MICRONS, SAID METALLIC MATERIAL BEING SUBSTANTIALLY NON-CORRODABLE AND NON-DEGRADABLE BY BODY FLUIDS, SAID POROUS COATING CONSISTING OF A PLURALITY OF SMALL DISCRETE GENERALLY BALL-SHAPED PARTICLES OF SAID METALLIC MATERIAL BONDED TOGETHER AT THEIR POINTS OF CONTACT WITH EACH OTHER AND SAID SUBSTRATE TO DEFINE A PLURALITY OF CONNECTED, INTERSTITIAL PORES UNIFORMLY DISTRIBUTED THROUGHOUT SAID COATING, SAID PARTICLES BEING OF A SIZE AND BEING SPACED FROM EACH OTHER TO ESTABLISH AN AVERAGE INTERSTITIAL PORE SIZE OF FROM ABOUT 20 MICRONS TO ABOUT 200 MICRONS SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT SAID COATING AND A COATING POROSITY OF BETWEEN ABOUT 10 AND ABOUT 40 PERCENT.
Claim 2
Dependent Claim
147 words
A SURGICAL PROSTHETIC DEVICE COMPRISING A COMPOSITE STRUCTURE CONSISTING OF A SOLID METALLIC MATERIAL SUBSTRATE AND A POROUS COATING OF SAID METALLIC MATERIAL ADHERD TO AND EXTENDING AT LEAST PARTIALLY OVER THE SURFACE OF SAID SUBSTRATE TO A THICKNESS OF ABOUT 100 MICRONS TO ABOUT 1,000 MICRONS, SAID METALLIC MATERIAL BEING SUBSTANTIALLY NON-CORRODABLE AND NON-DEGRADABLE BY BODY FLUIDS, SAID POROUS COATING CONSISTING OF A PLURALITY OF SMALL DISCRETE GENERALLY BALL-SHAPED PARTICLES OF SAID METALLIC MATERIAL BONDED TOGETHER AT THEIR POINTS OF CONTACT WITH EACH OTHER AND SAID SUBSTRATE TO DEFINE A PLURALITY OF CONNECTED, INTERSTITIAL PORES UNIFORMLY DISTRIBUTED THROUGHOUT SAID COATING, SAID PARTICLES BEING OF A SIZE AND BEING SPACED FROM EACH OTHER TO ESTABLISH AN AVERAGE INTERSTITIAL PORE SIZE OF FROM ABOUT 20 MICRONS TO ABOUT 200 MICRONS SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT SAID COATING AND A COATING POROSITY OF BETWEEN ABOUT 10 AND ABOUT 40 PERCENT.
Claim 3
Dependent Claim
19 words
The device of claim 1 wherein said average interstitial pore size is from about 50 to about 200 microns.
Claim 4
Dependent Claim
19 words
The device of claim 1 wherein said average interstitial pore size is from about 50 to about 100 microns.
Claim 5
Dependent Claim
21 words
The device of claim 1 wherein said metallic material is selected from austenitic stainless steel, titanium, titanium alloys and cobalt alloys.
Claim 6
Dependent Claim
11 words
The device of claim 1 wherein said metallic material is VITALLIUM.
Claim 7
Dependent Claim
19 words
The device of claim 1 wherein said metallic material is VITALLIUM and said particles are of +325 mesh size.
Claim 8
Dependent Claim
16 words
The device of claim 6 wherein said particle sizes are from +325 mesh to -100 mesh.
Claim 9
Dependent Claim
13 words
The device of claim 2 wherein said coating is impregnated with bone-binding cement.
Claim 10
Dependent Claim
17 words
The device of claim 7 wherein said coating is provided to a depth of about 500 microns.
Claim 11
Dependent Claim
78 words
The device of claim 1 wherein said solid substrate has two of said porous coatings of said metallic material adhered to and each extending partially over the surface of said substrate to said thickness, one of said porous coatings having an average interstitial pore size below about 50 microns for the ingrowth of soft tissue and the other of said porous coatings having an average interstitial pore size above about 50 microns for the ingrowth of hard tissue.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |