US3579416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging film comprising polyolefin outer layers and plural inner gas barrier layers
Assignee: Dow Chemical Co
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Filing: 1966-12-19
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Granted: 1971-05-18
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Expires: 1986-12-19
Abstract
Abstract A PACKAGING FILM IS CLAIMED WHICH INCORPORATES A GAS BARRIER CORE SUCH AS CINYLIDENE CHLORIDE POLYMER, THE GAS BARRIER CORE IS SLIT INTO A PLURALITY OF LAYERS WHICH PROVIDES IMPROVED BARRIER PROPERTIES AND CRUMPLE RESISTANCE OVER A SINGLE LAYER CORE.
Inventors
- 👤 Walter J Schrenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:49
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; 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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |