Patent US3836620A successfully refreshed from Google Patents.
US3836620A
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Method of forming polyamide-polyethylene composite films
Assignee: Honeywell International Inc
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Filing: 1972-06-27
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Granted: 1974-09-17
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Expires: 1992-06-27
Abstract
Abstract COMPOSITE FILMS ARE PROVIDED BY COEXTRUDING A POLYAMIDE WITH AT LEAST ONE COMBINATION OF POLYMERIC MATERIALS SELECTED FROM THE GROUP OF (1) )A) AN AETHYLENIC ACIDIC POLYMRR AND (B) A POLYOLEFIN HYDROCARBON; OR (2) A MIXTURE OF AN ETHYLENIC ACID POLYMER AND A POLYOLEFINIC HYDROCARBON OR (3) (A) A MIXTURE OF AN ETHYLENIC ACIDIC POLYMER AND A POLYOLEFINIC HYDROCARBON AND (B) A POLYOLEFINIC HYDROCARBON IN A NOVEL PROCESS WHICH PROVIDES FILMS HAVING AN EXCELLENT BALANCE OF PROPERTIES INCLUDING HIGH STRENGTH, CLARITY AND LOW MOISTURE AND GAS PERMEABILITY.
Inventors
- 👤 M Bhuta
- 👤 W Sacks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:11
CPC Classifications
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; B32B27/06; B32B27/08; B32B27/32; B32B27/34; B32B2307/00; B32B2307/30; B32B2307/31; B32B2323/00; B32B2323/04; B32B2379/00; B32B2379/08; B32B2439/00
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |