Patent US3764430A successfully refreshed from Google Patents.
US3764430A
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Method for making a metallized barrier structure or film
Assignee: Dow Chemical Co
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Filing: 1970-10-29
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Granted: 1973-10-09
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Expires: 1990-10-29
Abstract
Abstract A PROCESS FOR MAKING PACKAGING FILMS AND OTHER STRUCTURES HAVING EXCELLENT GAS AND WATER VAPOR BARRIER CHARACTERISTICS. THIS PROCESS UTILIZES A MULTILAYERED FILM WHICH IS FIRST SEPARATED INTO TWO WEBS OF ONE OR MORE LAYERS. ONE INNER LAYER SURFACE OF A WEB IS THEN METALLIZED. A COMPOSITE METALLIZED THERMOPLASTIC STRUCTURE RESULTS FROM RELAMINATION AFTER METALLIZATION. AN IMPORTANT FEATURE OF THIS PROCESS IS THE SELECTION OF THE TWO INNER LAYERS ADJACENT TO THE CONTACTING INTERFACES OF THE WEBS FROM THERMOPLASTIC COMPOSITIONS WHICH CHARACTERISTICALLY ADHEREPOORLY TO EACH OTHER BUT INDIVIDUALLY ADHERE WELL TO METAL.
Inventors
- 👤 W Schrenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:57
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B15/00; B32B15/04; B32B15/08; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7246; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 0
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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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |