US4427737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microporous adhesive tape
Assignee: ER Squibb and Sons LLC
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Filing: 1981-04-23
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Granted: 1984-01-24
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Expires: 2001-04-23
Abstract
Abstract A breathable tape comprising a porous backing layer and a microporous adhesive layer. The adhesive layer includes a rubbery elastomer, one or more water soluble or swellable hydrocolloids, and other optional substances and has a porosity of from about 1 to about 100 cc/sec/in2.
Inventors
- 👤 Rudolfo D. Cilento
- 👤 Charles Riffkin
- 👤 Anthony L. LaVia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:46
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/58; A61L15/585; A61L15/60; C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J7/30; C09J7/38; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10S428/913; Y10S602/00; Y10S602/903; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249979; Y10T428/249982; Y10T428/249983; Y10T428/249984; Y10T428/249985; Y10T428/26; Y10T428/269; Y10T428/28; Y10T428/2852; Y10T428/2857; Y10T428/2865; Y10T428/2878; Y10T428/2887; Y10T428/2896
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
A breathable tape consisting of a porous backing layer and a microporous adhesive layer; said adhesive layer comprising from about 30% to about 60% by weight of a rubbery elastomer selected from the group consisting of natural rubber, silicone rubber, acrylonitrile rubber, polyurethane rubber, and polyisobutylene, from about 20% to about 65% by weight of one or more water soluble or water swellable hydrocolloids selected from the group consisting of guar gum, sodium carboxymethylcellulose, cross-linked sodium carboxymethylcellulose, pectin, gelatin, alginic acid, locust bean gum and karaya gum, and up to 35% by weight of one or more tackifiers, plasticizers, antioxidants, and preservatives; said adhesive layer being at from about 2 mils to 10 mils in thickness and having a porosity of from about 1 to about 100 cc/sec/in 2 .
Claim 2
Dependent Claim
130 words
A breathable tape consisting of a porous backing layer and a microporous adhesive layer; said adhesive layer comprising from about 30% to about 60% by weight of a rubbery elastomer selected from the group consisting of natural rubber, silicone rubber, acrylonitrile rubber, polyurethane rubber, and polyisobutylene, from about 20% to about 65% by weight of one or more water soluble or water swellable hydrocolloids selected from the group consisting of guar gum, sodium carboxymethylcellulose, cross-linked sodium carboxymethylcellulose, pectin, gelatin, alginic acid, locust bean gum and karaya gum, and up to 35% by weight of one or more tackifiers, plasticizers, antioxidants, and preservatives; said adhesive layer being at from about 2 mils to 10 mils in thickness and having a porosity of from about 1 to about 100 cc/sec/in 2 .
Claim 3
Dependent Claim
51 words
A tape of claim 1 wherein said adhesive layer comprises from about 35% to 50% by weight of said rubbery elastomer, from about 30% to about 60% by weight of said hydrocolloid or mixtures of hydrocolloids, and up to 35% by weight of said mixture of tackifiers, plasticizers, antioxidants and preservatives.
Claim 4
Dependent Claim
25 words
A tape of claim 2 wherein said porous backing layer is a woven or non-woven fabric, an open mesh polymeric substance, or a polymeric foam.
Claim 5
Dependent Claim
14 words
A tape of claim 3 wherein said rubbery elastomer is one or more polyisobutylenes.
Claim 6
Dependent Claim
17 words
A tape of claim 4 wherein said hydrocolloid is a mixture of guar gum and alginic acid.
Claim 7
Dependent Claim
16 words
A tape of claim 4 wherein said hydrocolloid is a mixture of guar gum and pectin.
Claim 8
Dependent Claim
18 words
A tape of claim 4 wherein said hydrocolloid is a mixture of guar gum and crosslinked sodium carboxymethylcellulose.
Claim 9
Dependent Claim
20 words
A tape of claim 4 wherein said hydrocolloid is a mixture of guar gum, sodium carboxymethylcellulose, and cross-linked sodium carboxymethylcellulose.
Claim 10
Dependent Claim
17 words
A tape of claim 4 wherein said hydrocolloid is a mixture of pectin, gelatin, and sodium carboxymethylcellulose.
Claim 11
Dependent Claim
16 words
A tape of claim 4 wherein said hydrocolloid is a mixture of sodium carboxymethylcellulose and gelatin.
Claim 12
Dependent Claim
59 words
The tape of claim 10 wherein said porous backing is non-woven fabric and said microporous adhesive layer comprises about 18% by weight of sodium carboxymethylcellulose, about 15% by weight of gelatin, about 38% by weight of polyisobutylenes, about 20% by weight of terpene resin, about 8.5% by weight of mineral oil, and about 0.5% by weight of butylated hydroxytoluene.
Claim 13
Dependent Claim
22 words
The tape of claim 4 wherein said adhesive layer is 3 mils and has a porosity of about 5 cc/sec/in 2 .
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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |