US4044404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrillar lining for prosthetic device
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1975-08-01
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Granted: 1977-08-30
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Expires: 1995-08-01
Abstract
Abstract A lining for a prosthetic device such as an artificial internal organ comprises a mat of fibres prepared by electrostatically spinning an organic material and collecting the spun fibres on a receiver.
Inventors
- 👤 Graham Ernest Martin
- 👤 Ian Derek Cockshott
- 👤 Francis James Thomas Fildes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:18
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; A61L15/42; A61L15/425; A61L27/00; A61L27/14; A61L27/18; A61L27/50; A61L27/54; B05; B05B; B05B5/00; B05B5/025; B05B5/0255; B05B5/043; B32B3/00; B32B3/02; B32B3/04; B32B7/00; B32B7/04; B32B7/12; D; D01; D01D; D01D5/00; D01D5/0007; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/56; D04H1/70; D04H1/72; D04H1/728; D04H1/76; D04H5/00; D04H5/02; A61L2300/00; A61L2300/10; A61L2300/108; A61L2300/20; A61L2300/252; A61L2300/254; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2262/0292; B32B2535/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
28 words
A lining for a prosthetic device comprising a mat of organic fibers prepared by electrostatically spinning an organic material and collecting the spun fibers on a suitable receiver.
Claim 2
Dependent Claim
28 words
A lining for a prosthetic device comprising a mat of organic fibers prepared by electrostatically spinning an organic material and collecting the spun fibers on a suitable receiver.
Claim 3
Dependent Claim
20 words
A lining according to claim 1 in which the mat has an average pore size of 0.001 to 500 μ.
Claim 4
Dependent Claim
17 words
A lining according to claim 1 in which the mat has a porosity between 1 and 95%.
Claim 5
Dependent Claim
25 words
A lining according to claim 1 in which the mat is of a high molecular weight fiber forming thermoplastic, a fluorinated hydrocarbon, silicone or urea/formaldehyde.
Claim 6
Dependent Claim
23 words
A lining for a prosthetic device according to claim 1, in which the thickness of the mat is between 5 and 100 microns.
Claim 7
Dependent Claim
23 words
A lining for a prosthetic device according to claim 5, in which the thickness of the mat is between 10 and 50 microns.
Claim 8
Dependent Claim
24 words
A lining for a prosthetic device according to claim 1, in which the mat has an average pore size of 5 to 25 microns.
Claim 9
Dependent Claim
24 words
A lining for a prosthetic device according to claim 1 in which the mat has an average pore size of 7 to 15 microns.
Claim 10
Dependent Claim
21 words
A lining for a prosthetic device according to claim 1 in which the mat has a porosity of 70 to 80%.
Claim 11
Dependent Claim
20 words
A lining for a prosthetic device according to claim 1 in which the mat is reinforced by a reinforcing material.
Claim 12
Dependent Claim
21 words
A lining for a prosthetic device according to claim 10 in which the reinforcing material is metallic, polymeric or glass fiber.
Claim 13
Dependent Claim
27 words
A lining for a prosthetic device according to claim 11 in which the reinforcing material is in the form of a woven or non-woven web or helix.
Claim 14
Dependent Claim
21 words
A product according to claim 1 in which enzymes, drugs or active carbon are immobilised on the surface of the fibers.
Claim 15
Dependent Claim
16 words
A product according to claim 1 in which an inorganic material is incorporated in the fibers.
Claim 16
Dependent Claim
14 words
A product according to claim 14 in which the inorganic material is an electrolyte.
Claim 17
Dependent Claim
15 words
A product according to claim 1 in which the fibers of the mat comprise polytetrafluoroethylene.
Claim 18
Dependent Claim
80 words
A lining for a prosthetic device comprising a mat formed of electrostatically spun organic fibers and having a thickness of between 5 and 100 microns, an average pore size between 5 and 25 microns and a porosity of 70 to 80%, the fibers having a diameter of 0.1 to 10 microns and being prepared by introducing a liquid containing a fiber-forming organic material into an electric field, drawing fibers from the liquid to an electrode and hardening the drawn fibers.
Claim 19
Dependent Claim
80 words
A lining for a prosthetic device comprising a mat formed of electrostatically spun organic fibers and having a thickness of between 5 and 100 microns, an average pore size between 5 and 25 microns and a porosity of 70 to 80%, the fibers having a diameter of 0.1 to 10 microns and being prepared by introducing a liquid containing a fiber-forming organic material into an electric field, drawing fibers from the liquid to an electrode and hardening the drawn fibers.
References Cited (Backward Citations)
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Cited
US3556969A
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US3563228A
Cited
US3600717A
Cited
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Cited
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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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |