US3560227A
Expired / Lapsed
US
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High barrier coated papers comprising a film of resinous polyolefin and resinous barrier layer which is adhered to a paper substrate through an olefin adhesion promoting layer
Assignee: Dow Chemical Co
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Filing: 1968-01-17
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Granted: 1971-02-02
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Expires: 1988-01-17
Abstract
Abstract A NEW AND USEFUL HIGH BARRIER FILM IS DESCRIBED ALONG WITH A METHOD FOR ITS PREPARATION. A LAYERED POLYOLEFINHALOHYDROCARBON MELT IS DIRECTLY EXTRUDED ONTO A PRETREATED PAPER SUBSTRATE TO OBTAIN A NOVEL HIGH BARRIER COATED PAPER.
Inventors
- 👤 Jacob Eichhorn
- 👤 Stanley F Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/12; B32B27/30; B32B27/304; B32B27/306; B32B27/32; B32B7/00; B32B7/04; B32B7/12; D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; B29C48/03; B29C48/07; B29C48/08; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7244; B32B2307/7246; B32B2323/00; B32B2323/04; B32B2323/10; B32B2327/00; B32B2327/06; B32B2331/00; B32B2331/04; B32B2439/00; B32B2439/70; D21H19/10; D21H19/14; D21H19/20; D21H19/22; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |