Patent US1454765A successfully refreshed from Google Patents.
Patent US4090878A successfully refreshed from Google Patents.
US4090878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for preparing natural tissue for implantation
Assignee: Medtronic Inc
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Filing: 1977-09-22
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Granted: 1978-05-23
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Expires: 1997-09-22
Abstract
Abstract An arrangement for preparing natural tissue in the form of a heart valve, vessel or the like for implantation in which tanning fluid under pressure is applied to a portion of the tissue so as to cause said tissue to assume substantially its natural configuration, while additional tanning fluid is applied to the remainder of the tissue, said tanning fluid being so applied for a time sufficient to cause the tissue to become fixed, and, for vessels or the like, a guide may engage the tissue during fixation, whereby said tissue maintains substantially the configuration of the guide.
Inventors
- 👤 Warren D. Hancock
- 👤 Frederick P. Sattler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:10
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/062; A61F2/24; A61F2/2412; A61F2/2415
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
A device for preparing for implantation natural tissues in a form in which a portion thereof is subjected to pressure within the physiologic range when implanted comprising a tank, a quantity of tanning fluid in said tank, a reservoir at a predetermined height above said tank, a fluid conduit extending downwardly from said reservoir to a position adjacent said tank, means at the lower end of said conduit for engaging such tissues in said tank, and additional tanning fluid in said reservoir and said conduit for applying a pressure head to such tissues associated with said means at the end of said conduit for applying a predetermined pressure to such tissues.
Claim 2
Independent Claim
111 words
A device for preparing for implantation natural tissues in a form in which a portion thereof is subjected to pressure within the physiologic range when implanted comprising a tank, a quantity of tanning fluid in said tank, a reservoir at a predetermined height above said tank, a fluid conduit extending downwardly from said reservoir to a position adjacent said tank, means at the lower end of said conduit for engaging such tissues in said tank, and additional tanning fluid in said reservoir and said conduit for applying a pressure head to such tissues associated with said means at the end of said conduit for applying a predetermined pressure to such tissues.
Claim 3
Dependent Claim
35 words
A device as recited in claim 1 including addition guide means for engaging said tissues and maintaining said tissues substantially in a predetermined overall configuration while said tanning fluid is so applied to said tissues.
Claim 4
Dependent Claim
27 words
A device as recited in claim 2 in which said guide means is an elongated member adapted to be received within a chamber defined by such tissues.
Claim 5
Dependent Claim
21 words
A device as recited in claim 2 in which said guide means is a tubular member adapted to receive said tissues.
Claim 6
Dependent Claim
15 words
A device as recited in claim 2 in which said guide means is substantially U-shaped.
Claim 7
Independent Claim
100 words
A device for preparing for implantation natural tissues in a form in which a portion thereof is subjected to pressure within the physiologic range when implanted comprising a tank adapted to receive such tissues, a quantity of tanning fluid in said tank, a source of said tanning fluid under a predetermined pressure, a fluid conduit extending from said source of said tanning fluid under a predetermined pressure to a portion of said conduit at said tank, and means at said portion of said conduit for association with such tissues in said tank for applying a predetermined pressure to such tissues.
Claim 8
Independent Claim
100 words
A device for preparing for implantation natural tissues in a form in which a portion thereof is subjected to pressure within the physiologic range when implanted comprising a tank adapted to receive such tissues, a quantity of tanning fluid in said tank, a source of said tanning fluid under a predetermined pressure, a fluid conduit extending from said source of said tanning fluid under a predetermined pressure to a portion of said conduit at said tank, and means at said portion of said conduit for association with such tissues in said tank for applying a predetermined pressure to such tissues.
Claim 9
Dependent Claim
36 words
A device as recited in claim 6 including in addition guide means for engaging said tissues and maintaining said tissues substantially in a predetermined overall configuration while said tanning fluid is so applied to said tissues.
Claim 10
Dependent Claim
27 words
A device as recited in claim 7 in which said guide means is an elongated member adapted to be received within a chamber defined by such tissues.
Claim 11
Dependent Claim
21 words
A device as recited in claim 7 in which said guide means is a tubular member adapted to receive said tissues.
Claim 12
Dependent Claim
15 words
A device as recited in claim 7 in which said guide means is substantially U-shaped.
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |