Patent US3700380A successfully refreshed from Google Patents.
US3700380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface or lining compatible with blood or other tissue
Assignee: Tecna Corp
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Filing: 1970-10-01
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Granted: 1972-10-24
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Expires: 1990-10-01
Abstract
Abstract A surface or lining containing microcavities for anchoring pseudointimal growth within blood handling prostheses such as vascular grafts, heart assist pumps, artificial hearts, extracorporeal devices, and the like to form a thin, stable autologous lining. The surface is also compatible with other living tissue and promotes tissue adhesion to percutaneous leads, catheters, cannulae, etc., which inhibits bacterial penetration and consequent infection. A method of forming a lining or surface containing microcavities.
Inventors
- 👤 Sotiris Kitrilakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:05
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/0247; A61F; A61F2/00; A61F2/0077; A61F2/02; A61F2/04; A61F2/06; C; C08; C08J; C08J9/00; C08J9/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A prosthetic device having a tissue or blood-compatible flexible surface adapted to receive ingrowth of living cells from an interfacing region of tissue or blood, said surface including a plurality of adjacent substantially discrete pockets defined by walls which extend into said surface, said pockets having openings which face outwardly in the direction of said region of tissue or blood to provide means to accommodate a number of living cells, the walls of said pockets extending inwardly to a depth in the range of .002 to .020 inches to provide anchoring but not of such shape or size as to prevent essentially normal transfer of nutrients to said living cells in said pockets from said adjacent area of tissue or blood.
Claim 2
Dependent Claim
121 words
A prosthetic device having a tissue or blood-compatible flexible surface adapted to receive ingrowth of living cells from an interfacing region of tissue or blood, said surface including a plurality of adjacent substantially discrete pockets defined by walls which extend into said surface, said pockets having openings which face outwardly in the direction of said region of tissue or blood to provide means to accommodate a number of living cells, the walls of said pockets extending inwardly to a depth in the range of .002 to .020 inches to provide anchoring but not of such shape or size as to prevent essentially normal transfer of nutrients to said living cells in said pockets from said adjacent area of tissue or blood.
Claim 3
Dependent Claim
41 words
A prosthetic device as in claim 1 in which said prosthetic device is a hollow blood handling device with said surface in contact with the blood whereby blood cells entering into said pockets are nourished from the blood adjacent said surface.
Claim 4
Dependent Claim
14 words
A prosthetic device as in claim 1 in which the entire device is flexible.
Claim 5
Dependent Claim
24 words
A prosthetic device as in claim 1 wherein said device is rigid and the surface is part of a layer applied to the device.
Claim 6
Dependent Claim
20 words
A prosthetic device as in claim 3 wherein the surface is part of a layer applied to the flexible device.
Claim 7
Dependent Claim
30 words
A prosthetic device as in claim 1 wherein said device is an elongated device with said surface on the outside adapted to penetrate the skin and receive ingrowth of cells.
Claim 8
Dependent Claim
19 words
A prosthetic device as in claim 1 wherein the size and shape of said pockets have a predetermined distribution.
References Cited (Backward Citations)
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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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |