US3595740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolyzed ethylene/vinyl acetate copolymer as oxygen barrier layer
Assignee: EIDP Inc
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Filing: 1968-05-08
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Granted: 1971-07-27
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Expires: 1988-05-08
Abstract
Abstract OXYGEN BARRIER FILMS COMPRISING AN INNER BARRIER LAYER OF A MELT EXTRUDABLE HYDROLYZED ETHYLENE/VINYL ACETATE COPOLYMER AND OUTER LAYERS COMPRISING A BASE OF A THERMOPLASTIC POLYMER AND A HEAT SEALING LAYER OF AN ETHYLENE POLYMER OR COPOLYMER.
Inventors
- 👤 Clare W Gerow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:41
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31507; Y10T428/3154; Y10T428/31544; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |