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US5370684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthesis of polymeric material coated with biocompatible carbon
Assignee: Sorin Biomedica Cardio SpA
•
Filing: 1992-08-18
•
Granted: 1994-12-06
•
Expires: 2012-08-18
Abstract
Abstract A prosthetic device which includes a turbostratic biocompatible carbon film firmly adherent to a substrate and having a density of at least 2.1 g/cm 3 . The carbon preferably is very thin, e.g. , less than about one micron. The thin carbon biocompatible film covers at least that portion of the substrate which will be in contact with body tissue and/or fluids to insure against physiological rejection and degradation of the prosthetic device. The carbon can be deposited on a variety of substrates, including low temperature substrates, in situ, without adversely affecting the mechanical properties of the substrate. The prosthetic device of the invention is formed by triode sputtering vacuum deposition at a relatively low temperature to achieve the desired results with respect to the deposited carbon and the substrate and with respect to the required adherence therebetween.
Inventors
- 👤 Franco Vallana
- 👤 Pietro Arru
- 👤 Marco Santi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:27
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/303; C; C23; C23C; C23C14/00; C23C14/06; C23C14/0605; C23C14/22; C23C14/34; C23C14/35; C23C14/354; C23C14/355; A61F; A61F2310/00; A61F2310/00389; A61F2310/00574; Y; Y10; Y10S; Y10S623/00; Y10S623/90
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
58 words
A prosthetic device, comprising a substrate, and a thin coating of a turbostratic biocompatible carbon having a density of at least 2.2 g/cm 3 firmly adhered to said substrate, said coating deposited on said substrate by triode cathodic sputtering of carbon directly onto said substrate at a low temperature and a low pressure without degradation of said substrate.
Claim 2
Dependent Claim
58 words
A prosthetic device, comprising a substrate, and a thin coating of a turbostratic biocompatible carbon having a density of at least 2.2 g/cm 3 firmly adhered to said substrate, said coating deposited on said substrate by triode cathodic sputtering of carbon directly onto said substrate at a low temperature and a low pressure without degradation of said substrate.
Claim 3
Dependent Claim
14 words
The prosthetic device of claim 1 whenever said prosthetic device comprises an organic polymer.
Claim 4
Dependent Claim
13 words
The prosthetic device of claim 1 wherein said prosthetic device comprises now-refractory metal.
Claim 5
Dependent Claim
22 words
The prosthetic device of claim 1, wherein the density of the deposited carbon is between about 2.2 and 2.4 g/cm 3 .
Claim 6
Dependent Claim
25 words
The prosthetic device of claim 2, wherein the substrate is selected from the group consisting of polyester resins, polytetrafluoroethylene, silicone, polyacetal resins, polyurethanes or polyethylene.
Claim 7
Dependent Claim
22 words
The prosthetic device of claim 3, wherein said substrate is selected from the group consisting of cobalt-chromium alloys, titanium or titanium alloys.
Claim 8
Dependent Claim
19 words
The prosthetic device of claim 1, wherein said biocompatible carbon has a thickness of about 0.1 to 1.0 micron.
Claim 9
Dependent Claim
39 words
The prosthetic device of claim 1, wherein the device is tubing, wherein said substrate is an organic polymer, and wherein said biocompatible carbon coating is a dense, uniform film having a thickness of not more than about 1.0 micron.
Claim 10
Dependent Claim
20 words
The prosthetic device of claim 1 wherein said device is able to repeatedly flex without separation of the coating therefrom.
Claim 11
Dependent Claim
20 words
The prosthetic device of claim 2 wherein said organic polymer has a softening point of less than about 250° C.
Claim 12
Dependent Claim
65 words
A prosthetic device comprising a substrate, and a thin coating of turbostratic biocompatible carbon having a density of at least 2.2 g/cm 3 deposited directly on and firmly adherent to said substrate by triode cathodic sputtering of carbon onto said substrate without degradation of said substrate, wherein said substrate is selected from the group consisting of polyester resins, polytetrofluoroethylene, silicone, polyacetyl resins, polyurethanes and polyethylene.
Claim 13
Dependent Claim
65 words
A prosthetic device comprising a substrate, and a thin coating of turbostratic biocompatible carbon having a density of at least 2.2 g/cm 3 deposited directly on and firmly adherent to said substrate by triode cathodic sputtering of carbon onto said substrate without degradation of said substrate, wherein said substrate is selected from the group consisting of polyester resins, polytetrofluoroethylene, silicone, polyacetyl resins, polyurethanes and polyethylene.
Claim 14
Dependent Claim
22 words
The prosthetic device of claim 11 wherein said substrate is selected from the group consisting of cobalt-chromium alloys, titanium or titanium alloys.
Claim 15
Dependent Claim
69 words
A prosthetic device selected from the group consisting of a cardiac valve, tubing and suture yarn comprising a substrate and a thin coating of turbostratic biocompatible carbon having a density of at least 2.2 g/cm 3 and a thickness of not more than about 1.0 micron deposited directly on and firmly adherent to said substrate by triode cathodic sputtering of carbon onto said substrate without degradation of said substrate.
Claim 16
Dependent Claim
69 words
A prosthetic device selected from the group consisting of a cardiac valve, tubing and suture yarn comprising a substrate and a thin coating of turbostratic biocompatible carbon having a density of at least 2.2 g/cm 3 and a thickness of not more than about 1.0 micron deposited directly on and firmly adherent to said substrate by triode cathodic sputtering of carbon onto said substrate without degradation of said substrate.
Claim 17
Dependent Claim
60 words
A prosthetic device comprising a substrate and a thin coating of a turbostratic biocompatible carbon having a density of at least 2.2 g/cm 3 firmly adhered to said substrate, said coating deposited on said substrate by triode cathodic sputtering of carbon directly onto said substrate at a temperature below the softening point of the substrate without degradation of said substrate.
Claim 18
Dependent Claim
60 words
A prosthetic device comprising a substrate and a thin coating of a turbostratic biocompatible carbon having a density of at least 2.2 g/cm 3 firmly adhered to said substrate, said coating deposited on said substrate by triode cathodic sputtering of carbon directly onto said substrate at a temperature below the softening point of the substrate without degradation of said substrate.
Claim 19
Dependent Claim
75 words
A prosthetic device comprising a substrate and a thin coating of turbostratic biocompatible carbon having a density of at least 2.2 g/cm 3 firmly adhered to said substrate, said coating deposit, by triode cathodic sputtering of carbon directly onto said substrate at a temperature below the softening point of said substrate without degration of said substrate, wherein said substrate is selected from the group consisting of polyester resins, polytetrafluoroethylenes, silicones, polyacetyl resins, polyurethanes and polyethylenes.
Claim 20
Dependent Claim
75 words
A prosthetic device comprising a substrate and a thin coating of turbostratic biocompatible carbon having a density of at least 2.2 g/cm 3 firmly adhered to said substrate, said coating deposit, by triode cathodic sputtering of carbon directly onto said substrate at a temperature below the softening point of said substrate without degration of said substrate, wherein said substrate is selected from the group consisting of polyester resins, polytetrafluoroethylenes, silicones, polyacetyl resins, polyurethanes and polyethylenes.
Claim 21
Dependent Claim
98 words
A prosthetic device selected from the group consisting of a cardiac valve, tubing and suture yarn comprising a substrate and a thin coating of turbostratic biocompatible carbon having a density of at least 2.2 g/gm 3 and a thickness of not more than about 1.0 micron deposited directly on and firmly adherent to said substrate by triode cathodic sputtering of carbon onto said substrate at a temperature below the softening point of said substrate without degradation of said substrate, wherein said substrate is selected from the group consisting of polyester resins, polytetrafluoroethylenes, silicones, polyacetyl resins, polyurethanes and polyethylenes.
Claim 22
Dependent Claim
98 words
A prosthetic device selected from the group consisting of a cardiac valve, tubing and suture yarn comprising a substrate and a thin coating of turbostratic biocompatible carbon having a density of at least 2.2 g/gm 3 and a thickness of not more than about 1.0 micron deposited directly on and firmly adherent to said substrate by triode cathodic sputtering of carbon onto said substrate at a temperature below the softening point of said substrate without degradation of said substrate, wherein said substrate is selected from the group consisting of polyester resins, polytetrafluoroethylenes, silicones, polyacetyl resins, polyurethanes and polyethylenes.
Claim 23
Dependent Claim
58 words
A prosthetic device comprising a substrate and a thin coating of a turbostratic biocompatible carbon having a density of 2.4 g/cm 3 firmly adhered to said substrate, said coating deposited on said substrate by triode cathodic sputtering of carbon directly onto said substrate at a temperature below the softening point of the substrate without degradation of said substrate.
Claim 24
Dependent Claim
58 words
A prosthetic device comprising a substrate and a thin coating of a turbostratic biocompatible carbon having a density of 2.4 g/cm 3 firmly adhered to said substrate, said coating deposited on said substrate by triode cathodic sputtering of carbon directly onto said substrate at a temperature below the softening point of the substrate without degradation of said substrate.
Claim 25
Dependent Claim
73 words
A prosthetic device comprising a substrate, and a thin coating of turbostratic biocompatible carbon having a density of 2.4 g/cm 3 firmly adhered to said substrate, said coating deposited by triode cathodic sputtering of carbon directly onto said substrate at a temperature below the softening point of said substrate without degradation of said substrate wherein said substrate is selected from the group consisting of polyester resins, polytetrafluoroethylenes, silicones, polyacetyl resins, polyurethanes and polyethylenes.
Claim 26
Dependent Claim
73 words
A prosthetic device comprising a substrate, and a thin coating of turbostratic biocompatible carbon having a density of 2.4 g/cm 3 firmly adhered to said substrate, said coating deposited by triode cathodic sputtering of carbon directly onto said substrate at a temperature below the softening point of said substrate without degradation of said substrate wherein said substrate is selected from the group consisting of polyester resins, polytetrafluoroethylenes, silicones, polyacetyl resins, polyurethanes and polyethylenes.
Claim 27
Dependent Claim
96 words
A prosthetic device selected from the group consisting of a cardiac valve, tubing and suture yarn comprising a substrate and a thin coating of turbostratic biocompatible carbon having a density of 2.4 g/cm 3 and a thickness of not more than about 1.0 micron deposited directly on and firmly adherent to said substrate by triode cathodic sputtering of carbon onto said substrate at a temperature below the softening point of said substrate without degradation of said substrate, wherein said substrate is selected from the group consisting of polyester resins, polytetrafluoroethylenes, silicones, polyacetyl resins, polyurethanes and polyethylenes.
Claim 28
Dependent Claim
96 words
A prosthetic device selected from the group consisting of a cardiac valve, tubing and suture yarn comprising a substrate and a thin coating of turbostratic biocompatible carbon having a density of 2.4 g/cm 3 and a thickness of not more than about 1.0 micron deposited directly on and firmly adherent to said substrate by triode cathodic sputtering of carbon onto said substrate at a temperature below the softening point of said substrate without degradation of said substrate, wherein said substrate is selected from the group consisting of polyester resins, polytetrafluoroethylenes, silicones, polyacetyl resins, polyurethanes and polyethylenes.
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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) | 1997-12-05 | 1998-06-06 | 1998-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-05 | 2002-06-06 | 2002-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-05 | 2006-06-06 | 2006-12-06 | $7700.00 | Window Closed / Lapsed |