Patent US1653878A successfully refreshed from Google Patents.
US3967028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed foam web
Assignee: Beiersdorf AG
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Filing: 1974-12-12
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Granted: 1976-06-29
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Expires: 1994-12-12
Abstract
Abstract A web of polymeric foam which is sealed on one or both sides by a thin, hard plastic layer is disclosed. The sealed web is prepared by coating an auxiliary substrate with a film of hard plastic-forming resin, laminating this film to a polymeric foam web by means of a curable adhesive applied to the hard plastic, and removing the auxiliary substrate.
Inventors
- 👤 Heinz Muller
- 👤 Bodo Szonn
- 👤 Peter Jauchen
- 👤 Rolf Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:10
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; B; B32; B32B; B32B5/00; B32B5/18; B32B5/20; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/26; C08L; C08L75/00; C08L75/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249985; Y10T428/28; Y10T428/2848; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31573; Y10T428/3158; Y10T428/31587; Y10T428/31594
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
A sealed foam web which comprises a web of polyurethane, polyvinyl chloride or polyethylene foam, at least one side of which is covered with an adhesive intermediate layer of elastic polyurethane, said intermediate layer being bonded to said web and to a thin, hard thermosetting plastic sealing layer of a urea-formaldehyde resin or a melamine resin.
Claim 2
Dependent Claim
56 words
A sealed foam web which comprises a web of polyurethane, polyvinyl chloride or polyethylene foam, at least one side of which is covered with an adhesive intermediate layer of elastic polyurethane, said intermediate layer being bonded to said web and to a thin, hard thermosetting plastic sealing layer of a urea-formaldehyde resin or a melamine resin.
Claim 3
Dependent Claim
28 words
A web according to claim 1 wherein said sealing layer is up to 10 microns in thickness, and said intermediate layer is up to 70 microns in thickness.
Claim 4
Dependent Claim
21 words
The sealed web of claim 1 in which both sides of said web are covered with said adhesive and sealing layers.
Claim 5
Dependent Claim
13 words
The sealed web of claim 1 in which said polymeric foam is polyurethane.
Claim 6
Dependent Claim
21 words
The sealed web of claim 1 in which said sealing layer is a urea-formaldehyde resin and said adhesive layer is polyurethane.
Claim 7
Dependent Claim
20 words
The sealed web of claim 1 in which the sealed layer is a melamime resin blended with an alkyd resin.
Claim 8
Dependent Claim
21 words
An adhesive web comprising the sealed web of claim 1 in which the sealing layer is coated with an adhesive composition.
Claim 9
Dependent Claim
20 words
An adhesive web comprising the sealed web of claim 3 in which both sealing layers are coated with an adhesive.
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |