Patent US4527725A successfully refreshed from Google Patents.
US4133310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer fabric
Assignee: Smith and Nephew Research Ltd
•
Filing: 1975-10-30
•
Granted: 1979-01-09
•
Expires: 1995-10-30
Abstract
Abstract A non-woven fabric is produced by stretching the film with on one surface a regular pattern of raised areas such as spaced hexagonal bosses and on the other surface a plurality of parallel grooves. Stretching is carried out in the groove direction. Preferably the polymer is a mixture of incompatible polymers so that on stretching a fibrous structure is formed. The film can be produced by melt-embossing. The stretched non-woven fabric may be coated with various adhesives to provide a tape useful in a medical context.
Inventors
- 👤 Ronald Lloyd
- 👤 William O. Murphy
- 👤 Albert G. Patchell
- 👤 Peter J. Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:31
CPC Classifications
D; D04; D04H; D04H13/00; D04H13/02; C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J2400/00; C09J2400/20; C09J2400/26; C09J2400/263; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314; Y10T428/24479; Y10T428/24802; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984; Y10T428/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
A non-woven fabric made of thermoplastic polymer material and comprising a plurality of parallel chain-like structures each having raised bosses spaced along its length, said bosses being interconnected by a non-fibrous membrane or by a fibrillated area comprising a multitude of fibers, the said structures being themselves interconnected by further distinct fibrillated areas comprising a multitude of fibers, the fibers in these said further areas being predominantly oriented in one direction or at an angle not greater than 45° to said one direction, the fabric having good tear at least in said one direction.
Claim 2
Dependent Claim
94 words
A non-woven fabric made of thermoplastic polymer material and comprising a plurality of parallel chain-like structures each having raised bosses spaced along its length, said bosses being interconnected by a non-fibrous membrane or by a fibrillated area comprising a multitude of fibers, the said structures being themselves interconnected by further distinct fibrillated areas comprising a multitude of fibers, the fibers in these said further areas being predominantly oriented in one direction or at an angle not greater than 45° to said one direction, the fabric having good tear at least in said one direction.
Claim 3
Dependent Claim
77 words
A non-woven fabric in accordance with claim 1 wherein said further fibrillated areas are integral and merge into said bosses so that there are no distinct interfaces on a molecular level between said further fibrillated areas and said bosses, the fibres in each said further fibrillated area being oriented between adjacent bosses, the direction of orientation of the fibres in each further fibrillated area varying dependent upon the shape and size and relative disposition of said bosses.
Claim 4
Dependent Claim
40 words
A non-woven fabric as claimed in claim 1 in the form of a tape having on one surface thereof a physiologically acceptable gas-permeable and watervapour-permeable adhesive layer chosen from the group consisting of polyacrylate adhesives and polyvinyl ethyl ether adhesives.
Claim 5
Dependent Claim
25 words
A non-woven fabric provided with an adhesive layer as claimed in claim 3 in which the adhesive layer is a continuous layer of gas-permeable adhesive.
Claim 6
Dependent Claim
27 words
A non-woven fabric provided with an adhesive layer as claimed in claim 3 in which the adhesive layer is discontinuous and gas-permeable by virtue of the discontinuities.
Claim 7
Dependent Claim
11 words
A first aid dressing comprising tape as claimed in claim 3.
References Cited (Backward Citations)
US3457919A
Cited
US3682760A
Cited
US3906130A
Cited
US3922329A
Cited
US3950584A
Cited
US3969561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |