Patent US3698934A successfully refreshed from Google Patents.
US3698934A
Expired / Lapsed
US
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Method for making high barrier coated papers
Assignee: Dow Chemical Co
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Filing: 1970-09-01
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Granted: 1972-10-17
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Expires: 1990-09-01
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
2026-11-04 09:30
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B32; B32B; B32B27/00; D21H19/10; D21H19/14; D21H19/20; D21H19/22
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |