Patent US4855335A successfully refreshed from Google Patents.
US4855335A
Expired / Lapsed
US
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Medical moisture resistant adhesive composition for use in the presence of moisture
Assignee: Bostik Inc
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Filing: 1988-01-20
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Granted: 1989-08-08
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Expires: 2008-01-20
Abstract
Abstract Adhesive compositions useful for use with medical devices, such as adhesive tapes, consist essentially of a homogeneous mixture of one or more polyisobutylenes or blends of one or more polyisobutylenes; a tackifying resin; a styrene copolymer; mineral oil; a water insoluble, water swellable, synthetic hydrocolloid which forms a gel when wet; and, an ethylene vinyl acetate copolymer which increases the dimensional stability of the final composition.
Inventors
- 👤 Michael A. Neperud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:24
CPC Classifications
A; A61; A61L; A61L24/00; A61L24/04; A61L24/043; A61L15/00; A61L15/16; A61L15/42; A61L15/58; A61L15/585; C; C09; C09J; C09J123/00; C09J123/02; C09J123/18; C09J123/20; C09J123/22; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
A moisture resistant adhesive composition for use in the presence of moisture, said adhesive consisting essentially of a substantially homogeneous mixture one a percent weight basis of from about 5% to abut 10% of one or more low molecular weight polyisobutylenes, from about 7% to about 15% of a styrene block copolymer, from about 12% to about 20% of mineral oil, from about 15% to about 30% of a water insoluble, water swellable synthetic hydrocolloid which is a polyacrylic acid metallic sal that forms a gel when it is wet, from about 1% to about 8% of an ethylene vinyl acetate copolymer which increases dimensional stability and from about 30% to about 40% of a tackifying resin.
Claim 2
Dependent Claim
117 words
A moisture resistant adhesive composition for use in the presence of moisture, said adhesive consisting essentially of a substantially homogeneous mixture one a percent weight basis of from about 5% to abut 10% of one or more low molecular weight polyisobutylenes, from about 7% to about 15% of a styrene block copolymer, from about 12% to about 20% of mineral oil, from about 15% to about 30% of a water insoluble, water swellable synthetic hydrocolloid which is a polyacrylic acid metallic sal that forms a gel when it is wet, from about 1% to about 8% of an ethylene vinyl acetate copolymer which increases dimensional stability and from about 30% to about 40% of a tackifying resin.
Claim 3
Dependent Claim
17 words
An adhesive composition of claim 1 in which in the styrene copolymer is a styrene-isoprene-styrene block copolymer.
Claim 4
Dependent Claim
16 words
An adhesive composition of claim 1 in which tackifying resin is a glycerol ester of rosin.
Claim 5
Dependent Claim
115 words
A medical device comprising in part an adhesive layer containing a moisture resistant, pressure sensitive adhesive composition consisting essentially of a substantially homogeneous mixture on a percent weight basis of form about 5% to about 10% of one or more polyisobutylenes, from about 7% to about 15% of a styrene copolymer, from about 12% to about 20% of mineral oil, from about 15% to about 30% of a water insoluble, water swellable hydrocolloid which is a polyacrylic acid metallic salt, which turns into a gel when it is wet, from about 30% to about 40% of a tackifying resin and about 1% to about 8% of an ethylene vinyl acetate copolymer which increases dimensional stability.
Claim 6
Dependent Claim
115 words
A medical device comprising in part an adhesive layer containing a moisture resistant, pressure sensitive adhesive composition consisting essentially of a substantially homogeneous mixture on a percent weight basis of form about 5% to about 10% of one or more polyisobutylenes, from about 7% to about 15% of a styrene copolymer, from about 12% to about 20% of mineral oil, from about 15% to about 30% of a water insoluble, water swellable hydrocolloid which is a polyacrylic acid metallic salt, which turns into a gel when it is wet, from about 30% to about 40% of a tackifying resin and about 1% to about 8% of an ethylene vinyl acetate copolymer which increases dimensional stability.
Claim 7
Dependent Claim
15 words
A medical device of claim 4 wherein the styrene copolymer is a styrene-isoprene-styrene block copolymer.
Claim 8
Dependent Claim
15 words
A medical device of claim 4 wherein the polyisobutylene is a low molecular weight polyisoutylene.
Claim 9
Dependent Claim
16 words
A medical device of claim 4 wherein the tackifying resin is a glycerol ester of rosin.
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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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |