US4743499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocolloid laminate
Assignee: Variseal Manufacturing Corp
•
Filing: 1987-05-20
•
Granted: 1988-05-10
•
Expires: 2007-05-20
Abstract
Abstract A hydrocolloid laminate (10) useful as a wound dressing. The laminate product comprises a lower layer of hydrocolloid adhesive (11), an upper layer of flexible open-cell polymer foam (12), first film layer (13) interposed between the adhesive layer and the foam layer and second film layer (14) provided on the foam layer on the side (17) opposite the first film layer.
Inventors
- 👤 Robert W. Volke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:56
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; A; A61; A61F; A61F13/00; A61F13/02; A61F13/023; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/425; A61L15/60; B32B25/00; B32B25/04; B32B25/045; B32B25/16; B32B27/00; B32B27/06; B32B27/065; B32B27/40; A61F13/15; A61F13/84; A61F13/8405; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/51411; A61F13/53; A61F2013/530802; A61F13/534; A61F2013/53445; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2319/00; B32B2375/00; B32B2556/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249983; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/249993; Y10T428/28; Y10T428/2848; Y10T428/2852; Y10T428/2896
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
49 words
A hydrocolloid laminate comprising: a lower layer of hydrocolloid adhesive; an upper layer of flexible open-cell polymer foam; first film layer interposed between said adhesive layer and said polymer foam layer; and second film layer provided on said polymer foam layer on the side opposite said first film layer.
Claim 2
Dependent Claim
49 words
A hydrocolloid laminate comprising: a lower layer of hydrocolloid adhesive; an upper layer of flexible open-cell polymer foam; first film layer interposed between said adhesive layer and said polymer foam layer; and second film layer provided on said polymer foam layer on the side opposite said first film layer.
Claim 3
Dependent Claim
15 words
A hydrocolloid laminate, as set forth in claim 1, wherein said polymer foam comprises polyurethane.
Claim 4
Dependent Claim
16 words
A hydrocolloid laminate, as set forth in claim 1, wherein said first film layer comprises polyurethane.
Claim 5
Dependent Claim
17 words
A hydrocolloid laminate, as set forth in claim 1, wherein said first film layer comprises syndiotactic 1,2-polybutadiene.
Claim 6
Dependent Claim
16 words
A hydrocolloid laminate, as set forth in claim 1, wherein said second film layer comprises polyurethane.
Claim 7
Dependent Claim
17 words
A hydrocolloid laminate, as set forth in claim 1, wherein said second film layer comprises syndiotactic 1,2-polybutadiene.
Claim 8
Dependent Claim
26 words
A hydrocolloid laminate, as set forth in claim 1, further comprising a pressure sensitive adhesive layer between said first film layer and said polymer foam layer.
References Cited (Backward Citations)
US3339546A
Cited
US3645835A
Cited
US3536072A
Cited
US3648692A
Cited
US3908645A
Cited
US3972328A
Cited
US4253460A
Cited
US4427737A
Cited
US4538603A
Cited
US4650817A
Cited
US4551490A
Cited
US4655210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |