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Patent US3713175A successfully refreshed from Google Patents.
US3713175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal alloy cardiovascular implant device
Assignee: MTG Divestitures LLC
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Filing: 1970-11-19
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Granted: 1973-01-30
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Expires: 1990-11-19
Abstract
Abstract A prosthetic device for surgical implantation within the cardiovascular system of an animal is constructed of a cobaltchromium-tungsten-nickel-molybdenum alloy. The device is characterized in that it is non-thrombotic and substantially nonreactive with the chemicals found within the animal when implanted therein.
Inventors
- 👤 S Weisman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:58
CPC Classifications
A; A61; A61L; A61L33/00; A61L33/02; A61L33/022; A61L27/00; A61L27/02; A61L27/04; A61L27/045; A61F; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00029
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
A prosthetic device for surgical implantation within the cardiovascular system of an animal characterized in that the device is non-thrombotic and substantially non-reactive with the chemicals within the animal when implanted therein, said device being constructed of an alloy comprising the following elements: Elements Percent by Weight Chromium 22-25 Tungsten 7-8 Nickel 4.9-6.0 Molybdenum 2.4-3.0 Manganese 0.90-1.25 Silicon 0.50-1.20 Iron 0.40-0.80 Carbon 0.17-0.24 Cobalt Balance
Claim 2
Dependent Claim
65 words
A prosthetic device for surgical implantation within the cardiovascular system of an animal characterized in that the device is non-thrombotic and substantially non-reactive with the chemicals within the animal when implanted therein, said device being constructed of an alloy comprising the following elements: Elements Percent by Weight Chromium 22-25 Tungsten 7-8 Nickel 4.9-6.0 Molybdenum 2.4-3.0 Manganese 0.90-1.25 Silicon 0.50-1.20 Iron 0.40-0.80 Carbon 0.17-0.24 Cobalt Balance
Claim 3
Dependent Claim
13 words
A prosthetic device according to claim 1 wherein said device is a tube.
Claim 4
Dependent Claim
14 words
A prosthetic device according to claim 1 wherein said device is a heart valve.
Claim 5
Dependent Claim
15 words
A prosthetic device according to claim 1 wherein said alloy is in the as-cast condition.
Claim 6
Dependent Claim
17 words
A prosthetic device according to claim 1 wherein said alloy is in the solution heat treated condition.
Claim 7
Dependent Claim
91 words
In a method for implanting a prosthetic device within the cardiovascular system of an animal the device characterized by being non-thrombotic and substantially non-reactive with the chemicals of the animal when surgically implanted therein, the steps comprising treating said device with a reducing acid prior to implantation to remove substantially all of the oxide from the surface thereof, said device being constructed of an alloy comprising the following elements: Elements Percent by Weight Chromium 22-25 Tungsten 7-8 Nickel 4.9-6.0 Molybdenum 2.4-3.0 Manganese 0.90-1.25 Silicon 0.50-1.20 Iron 0.40-0.80 Carbon 0.17-0.24 Cobalt Balance
Claim 8
Dependent Claim
91 words
In a method for implanting a prosthetic device within the cardiovascular system of an animal the device characterized by being non-thrombotic and substantially non-reactive with the chemicals of the animal when surgically implanted therein, the steps comprising treating said device with a reducing acid prior to implantation to remove substantially all of the oxide from the surface thereof, said device being constructed of an alloy comprising the following elements: Elements Percent by Weight Chromium 22-25 Tungsten 7-8 Nickel 4.9-6.0 Molybdenum 2.4-3.0 Manganese 0.90-1.25 Silicon 0.50-1.20 Iron 0.40-0.80 Carbon 0.17-0.24 Cobalt Balance
References Cited (Backward Citations)
GB454881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |