US4444826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion laminated product
Assignee: Keueha Kagaku Kogyo KK
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Filing: 1982-03-01
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Granted: 1984-04-24
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Expires: 2002-03-01
Abstract
Abstract An extrusion laminated product is described comprising at least three layers, wherein at least one of the surface layers comprises polyvinylidene fluoride, and an adhesive layer which is provided between the surface layer and other thermoplastic resin layers comprises a polymer comprising at least one of methyl methacrylate and ethyl methacrylate as a major component or a composition containing said polymer as a main component and from 0.3 to 30 phr of an ultraviolet absorber.
Inventors
- 👤 Tohru Sasaki
- 👤 Hiroyuki Endoh
- 👤 Takeshi Nakadai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:42
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
An extrusion laminated product comprising at least three layers, wherein at least one of the surface layers comprises polyvinylidene fluoride and has a thickness of from 0.5 to 13μ, and an adhesive layer having a thickness of from 4 to 20μ which is provided between the surface layer and other thermoplastic resin layers and comprises a polymer comprising at least one of methyl methacrylate and ethyl methacrylate as a major component or a composition containing said polymer as a major component and from 0.3 to 30 phr of an ultraviolet absorber.
Claim 2
Dependent Claim
91 words
An extrusion laminated product comprising at least three layers, wherein at least one of the surface layers comprises polyvinylidene fluoride and has a thickness of from 0.5 to 13μ, and an adhesive layer having a thickness of from 4 to 20μ which is provided between the surface layer and other thermoplastic resin layers and comprises a polymer comprising at least one of methyl methacrylate and ethyl methacrylate as a major component or a composition containing said polymer as a major component and from 0.3 to 30 phr of an ultraviolet absorber.
Claim 3
Dependent Claim
27 words
An extrusion laminated product as in claim 1, wherein the surface layer comprising polyvinylidene fluoride additionally contains an ultraviolet absorber in an amount up to 3 phr.
Claim 4
Dependent Claim
24 words
An extrusion laminated product as in claim 1 or 2, wherein the adhesive layer contains from 1 to 15 phr of an ultraviolet absorber.
Claim 5
Dependent Claim
23 words
An extrusion laminated product as in claim 1, wherein the thickness of the surface layer comprising polyvinylidene fluoride is from 0.5μ to 5μ.
Claim 6
Dependent Claim
23 words
An extrusion laminated product as in claim 1, wherein the thickness of the surface layer comprising polyvinylidene fluoride is from 0.5μ to 3μ.
Claim 7
Dependent Claim
23 words
An extrusion laminated product as in claim 2, wherein the thickness of the surface layer comprising polyvinylidene fluoride is from 0.5μ to 5μ.
Claim 8
Dependent Claim
23 words
An extrusion laminated product as in claim 2, wherein the thickness of the surface layer comprising polyvinylidene fluoride is from 0.5μ to 3μ.
Claim 9
Dependent Claim
23 words
An extrusion laminated product as in claim 3, wherein the thickness of the surface layer comprising polyvinylidene fluoride is from 0.5μ to 5μ.
Claim 10
Dependent Claim
23 words
An extrusion laminated product as in claim 3, wherein the thickness of the surface layer comprising polyvinylidene fluoride is from 0.5μ to 3μ.
References Cited (Backward Citations)
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Cited
US4272585A
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US4221757A
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US4317860A
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US4317861A
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JPS5686748A
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US4378392A
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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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |