US3890107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Materials useful for prosthetic devices and the like
Assignee: Research Corp
•
Filing: 1972-09-25
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Granted: 1975-06-17
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Expires: 1992-09-25
Abstract
Abstract A material useful as a biomaterial for the manufacture of prosthetic devices and the like is provided by a synthetic material characterized by having the microstructure corresponding to the microstructure of porous carbonate skeletal material of marine life, such as marine invertebrate skeletal material, e.g. echinoid spine calcite and Porites skeletal aragonite. Such synthetic materials are prepared by producing a replicate in negative or positive form of the microstructure of the aforesaid porous carbonate skeletal material.
Inventors
- 👤 Eugene W White
- 👤 Jon N Weber
- 👤 Rodney A White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:19
CPC Classifications
A; A61; A61L; A61L27/00; A61F; A61F2/00; A61F2/02; A61F2/28; A61L27/50; A61L27/56; A61F2/30; A61F2/3094; A61F2/30942; A61F2002/30957; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00035; A61F2310/00113; A61F2310/00119; A61F2310/00131; A61F2310/00149; A61F2310/00155; A61F2310/00179; A61F2310/00185; A61F2310/00203; A61F2310/00353; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12479; Y10T428/31504; Y10T428/31678; Y10T428/31855
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
118 words
A SUBSTANTIALLY UNIFORM PERMEABLE MICROPOROUS SYNTHETIC MATERIAL USEFUL AS A BIOMATERIAL, SUCH AS FOR THE MANUFACTURE OF PROSTHETIC DEVICES, CHARACTERIZED BY A SUBSTANTIALLY UNIFORM PORE VOLUME IN THE RANGE FROM ABOUT 10 TO ABOUT 90% AND HAVING A MICROSTRUCTURE CHARACTERIZED BY A PRONOUNCED THREEDIMENSIONAL FFENESTRATE STRUCTURE CORRESPONDING TO THE MICROSTRUCTURE OF THE POROUS CARBONATE ECHINODERM OR SCLEARACTINIAN CORAL SKELETAL MATERIAL OF MARINE LIFE AND PROVIDING A PERIODIC MINIMAL SURFACE, SAID PERIODIC MINIMALSURFACE DIVIDING THE VOLUME OF SAID MATERIAL INTO TWO INTERPENETRATING REGIONS, EACH OF WHICH IS A SINGLE, MULTIPLY CONNECTED DOMAIN, SAID MATERIAL HAVING A SUBSTANTIALLY UNIFORM PORE SIZE DIAMETER AND SUBSTANTIALLY UNIFORM PORE CONNECTIONS OR OPENINGS IN THE RANGE FROM ABOUT 5 MICRONS TO ABOUT 500 MICRONS.
Claim 2
Dependent Claim
118 words
A SUBSTANTIALLY UNIFORM PERMEABLE MICROPOROUS SYNTHETIC MATERIAL USEFUL AS A BIOMATERIAL, SUCH AS FOR THE MANUFACTURE OF PROSTHETIC DEVICES, CHARACTERIZED BY A SUBSTANTIALLY UNIFORM PORE VOLUME IN THE RANGE FROM ABOUT 10 TO ABOUT 90% AND HAVING A MICROSTRUCTURE CHARACTERIZED BY A PRONOUNCED THREEDIMENSIONAL FFENESTRATE STRUCTURE CORRESPONDING TO THE MICROSTRUCTURE OF THE POROUS CARBONATE ECHINODERM OR SCLEARACTINIAN CORAL SKELETAL MATERIAL OF MARINE LIFE AND PROVIDING A PERIODIC MINIMAL SURFACE, SAID PERIODIC MINIMALSURFACE DIVIDING THE VOLUME OF SAID MATERIAL INTO TWO INTERPENETRATING REGIONS, EACH OF WHICH IS A SINGLE, MULTIPLY CONNECTED DOMAIN, SAID MATERIAL HAVING A SUBSTANTIALLY UNIFORM PORE SIZE DIAMETER AND SUBSTANTIALLY UNIFORM PORE CONNECTIONS OR OPENINGS IN THE RANGE FROM ABOUT 5 MICRONS TO ABOUT 500 MICRONS.
Claim 3
Dependent Claim
16 words
A synthetic material in accordance with claim 1 wherein the synthetic material is a metal alloy.
Claim 4
Dependent Claim
25 words
A synthetic material in accordance with claim 2 wherein said alloy is an alloy comprising about 65% cobalt, about 35% chromium and about 5% molybdenum.
Claim 5
Dependent Claim
16 words
A synthetic material in accordance with claim 1 wherein the synthetic material is a polymerized methacrylate.
Claim 6
Dependent Claim
14 words
A synthetic material in accordance with claim 1 wherein said synthetic material is tin.
Claim 7
Dependent Claim
14 words
A synthetic material in accordance with claim 1 wherein said synthetic material is gold.
Claim 8
Dependent Claim
14 words
A synthetic material in accordance with claim 1 wherein said synthetic material is silver.
Claim 9
Dependent Claim
14 words
A synthetic material in accordance with claim 1 wherein said synthetic material is platinum.
Claim 10
Dependent Claim
14 words
A synthetic material in accordance with claim 1 wherein said synthetic material is tantalum.
Claim 11
Dependent Claim
16 words
A synthetic material in accordance with claim 1 wherein said synthetic material is a titanium alloy.
Claim 12
Dependent Claim
16 words
A synthetic material in accordance with claim 1 wherein said synthetic material is 316L stainless steel.
Claim 13
Dependent Claim
15 words
A synthetic material in accordance with claim 1 wherein said synthetic material is alpha alumina.
Claim 14
Dependent Claim
15 words
A synthetic material in accordance with claim 1 wherein said synthetic material is a ceramic.
Claim 15
Dependent Claim
15 words
A synthetic material in accordance with claim 1 wherein said synthetic material is a cermet.
Claim 16
Dependent Claim
17 words
A synthetic material in accordance with claim 1 wherein said synthetic material is an anti-thrombogenic carbonaceous material.
Claim 17
Dependent Claim
49 words
A synthetic material in accordance with claim 1 having the ratio of pore volume to the volume of the solid of approximately 1 and having cross-sectional diameters of both the pore and the solid phases of about the same dimension, ranging from about 5 microns to about 500 microns.
Claim 18
Dependent Claim
19 words
A synthetic material in accordance with claim 1 having a pore size diameter in the range about 40-100 microns.
Claim 19
Dependent Claim
19 words
A synthetic material in accordance with claim 1 having a pore size diameter in the range about 5-15 microns.
Claim 20
Dependent Claim
25 words
A microporous synthetic material in accordance with claim 1 wherein said material has pore connections in the range from about 100 to about 200 microns.
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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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |