Patent DE2336974A1 successfully refreshed from Google Patents.
US3688318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and articles for preventing clotting of blood
Assignee: Introspec Inc
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Filing: 1970-09-17
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Granted: 1972-09-05
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Expires: 1990-09-17
Abstract
Abstract A method for preventing the formation of clots in blood in contact with synthetic articles and preventing deterioration of said synthetic articles involving coating the entire blood contacting surface of said articles with a layer of molybdenum and placing the molybdenum coated surface of said article in contact with blood. The present invention is well adapted to be utilized in replacing cardio-vascular organs such as blood vessels and heart valves because the molybdenum coated articles of this invention are flexible, will last indefinitely when in contact with blood, will not react with the blood and are nonthrombogenic.
Inventors
- 👤 Louis J Alfano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:03
CPC Classifications
A; A61; A61L; A61L33/00; A61L33/02; A61L33/027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
11 words
A method according to claim 1 wherein the substrate is plastic.
Claim 2
Dependent Claim
11 words
A method according to claim 1 wherein the substrate is nylon.
Claim 3
Dependent Claim
11 words
A method according to claim 2 wherein the plastic is nylon
Claim 4
Independent Claim
81 words
A method for replacing a defective blood vessel in an animal body which comprises removing the defective blood vessel from the remaining portion of the non-defective blood vessel and replacing the defective blood vessel with a flexible plastic tube of a length and diameter of the defective blood vessel, the surface of said plastic tube which is to be in contact with blood having a thin layer of molybdenum thereon by connecting same to the remaining portion of the blood vessel.
Claim 5
Dependent Claim
84 words
A non-thrombogenic synthetic blood vessel for use in animals to replace a portion of a blood vessel which is defective comprising: a flexible tube having an internal diameter generally the same as the diameter of the blood vessel to be replaced and having a corresponding length; said flexible tube having a thin coating of molybdenum continuously on the inner and outer surfaces of said tube whereby said tube is protected from attack by blood and the blood flowing therethrough is prevented from forming clots.
Claim 6
Dependent Claim
14 words
A synthetic blood vessel according to claim 6 wherein said flexible tube is plastic.
Claim 7
Dependent Claim
13 words
A synthetic blood vessel according to claim 7 wherein said plastic is nylon.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |