US4743250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial blood vessel and method of manufacture
Assignee: Toray Industries Inc
•
Filing: 1985-10-09
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Granted: 1988-05-10
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Expires: 2005-10-09
Abstract
Abstract An artificial blood vessel comprises a woven, braided or knitted fabric structure. Fibers so extend from a surface of the fabric structure as to be randomly intertwined with the fabric structure. The intertwining of the fibers with the fabric structure can be achieved by applying a high fluid pressure against a surface of the fabric structure.
Inventors
- 👤 Hideaki Kitagawa
- 👤 Koji Watanabe
- 👤 Miyoshi Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:30
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; Y; Y10; Y10S; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
A method of manufacturing an artificial blood vessel of fabric having a woven, braided or knitted fabric structure which comprises forming the fabric into the shape of a tube, inserting a spacer into the tube, and applying a high fluid pressure uniformlly against a surface of the said tube-shaped fabric structure with the spacer inserted therin, the application of the fluid pressure being such that fibers on the said surface are randomly intertwined with said fabric structure.
Claim 2
Independent Claim
77 words
A method of manufacturing an artificial blood vessel of fabric having a woven, braided or knitted fabric structure which comprises forming the fabric into the shape of a tube, inserting a spacer into the tube, and applying a high fluid pressure uniformlly against a surface of the said tube-shaped fabric structure with the spacer inserted therin, the application of the fluid pressure being such that fibers on the said surface are randomly intertwined with said fabric structure.
Claim 3
Dependent Claim
23 words
A method as defined in claim 1, wherein at least some of the said intertwined fibers have a fineness less than 1.0 denier.
Claim 4
Dependent Claim
12 words
A method as defined in claim 1, wherein the fluid is water.
Claim 5
Dependent Claim
43 words
A method as defined in claim 1, wherein fibers extending from a surface of the said fabric structure are provided prior to the said application of the high fluid pressure so as to randomly intertwine the said extending fibers with the fabric structure.
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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) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |