US4529666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticized polyvinyl alcohol
Assignee: Bayer AG
•
Filing: 1984-12-10
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Granted: 1985-07-16
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Expires: 2004-12-10
Abstract
Abstract Plasticized polyvinyl alcohol containing one or more 1,4-monoanhydrohexitols and/or one or more 1,4-3,6-dianhydrohexitols and its use for the production of composite films by coextrusion, coating, doubling and lamination.
Inventors
- 👤 Herbert Salzburg
- 👤 Klaus Reinking
- 👤 Frank Kleiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:29
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/34; C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535; B32B2307/00; B32B2307/70; B32B2307/724; B32B2398/00; B32B2398/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31855
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
Plasticized polyvinyl alcohol, which contains from 1 to 35% by weight, based on the total mixture, of one or more 1,4-monoanhydrohexitols and/or one or more 1,4-3,6-dianhydrohexitols.
Claim 2
Dependent Claim
26 words
Plasticized polyvinyl alcohol, which contains from 1 to 35% by weight, based on the total mixture, of one or more 1,4-monoanhydrohexitols and/or one or more 1,4-3,6-dianhydrohexitols.
Claim 3
Dependent Claim
12 words
Gas impermeable film made from the plasticized polyvinyl alcohol of claim 1.
Claim 4
Dependent Claim
23 words
Gas impermeable film made from a layer of plasticized polyvinyl alcohol of claim 1 and at least one layer of a thermoplastic polymer.
Claim 5
Dependent Claim
21 words
Gas impermeable film made from a layer of plasticized polyvinyl alcohol of claim 1 and at least one layer of polyamide.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |