US3843974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intimal lining and pump with vertically drafted webs
Assignee: United States Department of Health and Human Services
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Filing: 1972-01-05
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Granted: 1974-10-29
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Expires: 1992-01-05
Abstract
Abstract An intimal lining and a circulatory assist device comprising a pump means with associated inlet and outlet valves and means for connecting said pump to a human arterial blood supply containing at least in the pump chamber a non-porous elastomeric substrate with an intimal lining consisting of a vertically expanded microfiber web of polypropylene fibers 10-50 microns deep and containing a substantial percentage of surface pores in the range 20-100 microns and in which the fibers have an average fiber diameter of about 0.05-1.0 micron.
Inventors
- 👤 W Miller
- 👤 J Byck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:28
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/14; A61L27/16; A61L27/18; A61L33/00; A61L33/06; A61L33/068; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
THE INTIMAL LINING FOR A CIRCULATORY ASSIST DEVICE COMPRISING A TISSUE LAYER GROWING ON AND ANCHORED TO AN ELASTOMERIC SUBSTRATE WITH A HIGHLY POROUS NON-WOVEN VERTICALLY DRAFTED WEB, SAID WEB HAVING A VERTICAL THICKNESS DIMENSION OF ABOUT 10-50 MICRONS AND A SUBSTANTIAL PERCENTAGE OF SURFACE PORES IN THE RANGE 20-100 MICRONS AND IN WHICH THE FIBERS HAVE AN AVERAGE FIBER DIAMETER OF ABOUT 0.05-1.0 MICRON, SAID WEB HAVING BEEN PRODUCED FROM AN ELONGATED HIGH MODULUS POLYOLEFIN MICROFIBER TAPE WHICH HAS BEEN VERTICALLY DRAFTED.
Claim 2
Dependent Claim
83 words
THE INTIMAL LINING FOR A CIRCULATORY ASSIST DEVICE COMPRISING A TISSUE LAYER GROWING ON AND ANCHORED TO AN ELASTOMERIC SUBSTRATE WITH A HIGHLY POROUS NON-WOVEN VERTICALLY DRAFTED WEB, SAID WEB HAVING A VERTICAL THICKNESS DIMENSION OF ABOUT 10-50 MICRONS AND A SUBSTANTIAL PERCENTAGE OF SURFACE PORES IN THE RANGE 20-100 MICRONS AND IN WHICH THE FIBERS HAVE AN AVERAGE FIBER DIAMETER OF ABOUT 0.05-1.0 MICRON, SAID WEB HAVING BEEN PRODUCED FROM AN ELONGATED HIGH MODULUS POLYOLEFIN MICROFIBER TAPE WHICH HAS BEEN VERTICALLY DRAFTED.
Claim 3
Dependent Claim
24 words
The intimal lining for a circulatory assist device according to claim 1 in which a polyxylylene conformal coating has been applied to the web.
Claim 4
Dependent Claim
76 words
The intimal lining for a circulatory assist device comprising an elastomeric substrate selected from at least one member of the group consisting of polyurethane and silicone rubber and a vertically expanded highly porous non-woven polypropylene web lining, said lining having a vertical thickness dimension of about 10-50 microns and a substantial percentage of surface pores in the range 20-100 microns and in which the fibers have an average fiber diameter of about 0.05 - 1.0 micron.
Claim 5
Dependent Claim
76 words
The intimal lining for a circulatory assist device comprising an elastomeric substrate selected from at least one member of the group consisting of polyurethane and silicone rubber and a vertically expanded highly porous non-woven polypropylene web lining, said lining having a vertical thickness dimension of about 10-50 microns and a substantial percentage of surface pores in the range 20-100 microns and in which the fibers have an average fiber diameter of about 0.05 - 1.0 micron.
Claim 6
Dependent Claim
86 words
A circulatory assist device comprising a pump means with associated inlet and outlet valves and means for connecting said pump to a human arterial blood supply containing at least in the pump chamber a non-porous elastomeric substrate with an intimal lining consisting of a vertically expanded highly porous non-woven microfiber web of polypropylene fibers 10-50 microns deep and containing a substantial percentage of surface pores in the range 20-100 microns and in which the fibers have an average fiber diameter of about 0.05 - 1.0 micron.
Claim 7
Dependent Claim
86 words
A circulatory assist device comprising a pump means with associated inlet and outlet valves and means for connecting said pump to a human arterial blood supply containing at least in the pump chamber a non-porous elastomeric substrate with an intimal lining consisting of a vertically expanded highly porous non-woven microfiber web of polypropylene fibers 10-50 microns deep and containing a substantial percentage of surface pores in the range 20-100 microns and in which the fibers have an average fiber diameter of about 0.05 - 1.0 micron.
Claim 8
Dependent Claim
13 words
The device according to claim 4 wherein the elastomer substrate is a polyurethane.
Claim 9
Dependent Claim
14 words
The device according to claim 4 wherein the elastomeric substrate is a silicone rubber.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |