US4043331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrillar product of electrostatically spun organic material
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1975-08-01
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Granted: 1977-08-23
•
Expires: 1995-08-01
Abstract
Abstract A product comprising a mat of fibers prepared by electrostatically spinning an organic material and collecting the spun fibers on a suitable receiver.
Inventors
- 👤 Graham Ernest Martin
- 👤 Ian Derek Cockshott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:32
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: 18
Claim 1
Independent Claim
24 words
A product 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
24 words
A product 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 product 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 product according to claim 1 in which the mat has a porosity between 1 and 95%.
Claim 5
Dependent Claim
25 words
A product according to claim 1 in which the mat is of a high molecular weight fibre forming thermoplastic, a fluorinated hydrocarbon, silicone or urea/formaldehyde.
Claim 6
Dependent Claim
13 words
A product according to claim 1 in the form of a wound dressing.
Claim 7
Dependent Claim
20 words
A wound dressing according to claim 5 in which the thickness of the mat is between 25 and 1500 μ.
Claim 8
Dependent Claim
20 words
A wound dressing according to claim 6 in which the thickness of the mat is between 50 and 1000 μ.
Claim 9
Dependent Claim
21 words
A wound dressing according to claim 5 in which the mat has an average pore size of 1 to 100 μ.
Claim 10
Dependent Claim
19 words
A wound dressing according to claim 5 in which the mat has a porosity of between 60 and 80%.
Claim 11
Dependent Claim
20 words
A wound dressing according to claim 5 comprising a mat of electrostatically spun fibres in association with a backing layer.
Claim 12
Dependent Claim
41 words
A wound dressing according to claim 5 comprising a mat of electrostatically spun fibres in association with a backing layer, and having interposed therebetween an absorbent pad, said pad having an area smaller than, or equal to that of the mat.
Claim 13
Dependent Claim
21 words
A product according to claim 1 in which enzymes, drugs or active carbon are immobilised on the surface of the fibres.
Claim 14
Dependent Claim
16 words
A product according to claim 1 in which an inorganic material is incorporated in the fibres.
Claim 15
Dependent Claim
14 words
A product according to claim 13 in which the inorganic material is an electrolyte.
Claim 16
Dependent Claim
16 words
The product according to claim 1 in which the fibres of the mat comprise polytetrafluoro ethylene.
Claim 17
Dependent Claim
85 words
A wound dressing comprising a flexible non-absorbent hydrophobic mat formed of electrostatically spun organic fibres and having a thickness of between 25 and 1500 microns, an average pore size between 50 and 100 microns and a porosity of 60 to 80%, the fibres having a diameter of 0.1 to 25 microns and being prepared by introducing a liquid containing a fibre-forming organic material into an electric field, drawing fibres from the liquid to an electrode and hardening the drawn fibres, and a non-absorbent backing layer.
Claim 18
Dependent Claim
85 words
A wound dressing comprising a flexible non-absorbent hydrophobic mat formed of electrostatically spun organic fibres and having a thickness of between 25 and 1500 microns, an average pore size between 50 and 100 microns and a porosity of 60 to 80%, the fibres having a diameter of 0.1 to 25 microns and being prepared by introducing a liquid containing a fibre-forming organic material into an electric field, drawing fibres from the liquid to an electrode and hardening the drawn fibres, and a non-absorbent backing layer.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |