Patent US4172295A successfully refreshed from Google Patents.
US4172295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tri-cuspid three-tissue prosthetic heart valve
Assignee: Livanova Holding USA Inc
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Filing: 1978-01-27
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Granted: 1979-10-30
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Expires: 1998-01-27
Abstract
Abstract This invention relates to improvements in a tri-cuspid tissue prosthetic heart valve having a valve body with sewing holes provided at each interval between the cusps of the valve, which improvements are realized by the formation of the tissue from three pieces joined together at seams disposed along the intervals between the cusps of the valve.
Inventors
- 👤 Richard J. Batten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:30
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2220/00; A61F2220/0025; A61F2220/0075; Y; Y10; Y10S; Y10S623/00; Y10S623/90
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A method for improving the alignment of tissue on a multi-cusp tissue prosthetic heart valve frame, comprising; forming stitch receiving apertures through said frame corresponding to the boundaries between cusps in said valve; obtaining the tissue used to form the valve cusps of said valve from a plural number of tissues corresponding to the number of cusps of said valve; joining said plural tissues into one piece by sewing seams between each of said plural tissues forming a juncture at each of said seams; and precisely aligning said one piece of tissue onto the body of said valve by inserting a needle through each of said junctures and through each of said stitch receiving apertures in said frame.
Claim 2
Independent Claim
118 words
A method for improving the alignment of tissue on a multi-cusp tissue prosthetic heart valve frame, comprising; forming stitch receiving apertures through said frame corresponding to the boundaries between cusps in said valve; obtaining the tissue used to form the valve cusps of said valve from a plural number of tissues corresponding to the number of cusps of said valve; joining said plural tissues into one piece by sewing seams between each of said plural tissues forming a juncture at each of said seams; and precisely aligning said one piece of tissue onto the body of said valve by inserting a needle through each of said junctures and through each of said stitch receiving apertures in said frame.
Claim 3
Dependent Claim
32 words
The method of claim 1 further comprising a tuck stitch in said tissue proximal each of said set of sewing holes and disposed opposite said seam adjacent said set of sewing holes.
Claim 4
Dependent Claim
86 words
A multi-cusp prosthetic heart valve formed of tissue comprising: a frame; a plural number of sets of sewing holes extending through said frame at each of the boundaries between the cusps of said valve; a plural number of tissue pieces corresponding to the number of said cusps; a plural number of seams joining said tissue pieces into a single piece, forming thin juncture lines between adjacent tissue pieces; and, thread stitched through said juncture lines and through each adjacent set of sewing holes through said frame.
Claim 5
Dependent Claim
86 words
A multi-cusp prosthetic heart valve formed of tissue comprising: a frame; a plural number of sets of sewing holes extending through said frame at each of the boundaries between the cusps of said valve; a plural number of tissue pieces corresponding to the number of said cusps; a plural number of seams joining said tissue pieces into a single piece, forming thin juncture lines between adjacent tissue pieces; and, thread stitched through said juncture lines and through each adjacent set of sewing holes through said frame.
Claim 6
Dependent Claim
20 words
The heart valve defined in claim 3 further comprising a tuck stitch in said tissue proximal each of said seams.
Claim 7
Dependent Claim
55 words
A multi-cuspid prosthetic heart valve comprising: a frame having sewing holes provided therein; a plural number tissues equal to the number of cusps of said valve; a plural number of seams joining each of said tissues into one piece of tissue; and thread passing through said seams and through sewing holes in said rigid frame.
Claim 8
Dependent Claim
55 words
A multi-cuspid prosthetic heart valve comprising: a frame having sewing holes provided therein; a plural number tissues equal to the number of cusps of said valve; a plural number of seams joining each of said tissues into one piece of tissue; and thread passing through said seams and through sewing holes in said rigid frame.
Claim 9
Dependent Claim
18 words
The prosthetic heart valve defined in claim 5 wherein said plural number of cusps is equal to 3.
References Cited (Backward Citations)
US3714671A
Cited
US4084268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |