Patent US2950218A successfully refreshed from Google Patents.
US2950218A
Expired / Lapsed
US
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Packaging film and process for preparation thereof
Assignee: EIDP Inc
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Filing: 1957-07-23
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Granted: 1960-08-23
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Expires: 1977-07-23
Abstract
No abstract record available.
Inventors
- 👤 Covington Edward Royals
- 👤 Meier John Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:04
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PACKAGING MATERIAL COMPRISING A BASE SHEET HAVING AT LEAST SURFACE COATED WITH A COMPOSITION COMPRISING ESSENTIALLY A COPOLYMER OBTAINED FROM 80-96% BY WEIGHT OF VINYLIDENE CHLORIDE, 0.5-7% BY WEIGHT OF ISOPROPENYL ACETRATE AND 2-19.5% BY WEIGHT OF AT LEAST ONE OTHER POLYMERIZABLE MONO-OLEFINIC MONOMER COPOLYMERIZABLE WITH VINYLIDENE CHLORIDE SELECTED FROM THE GROUP CONSISTING OF ALKYL ACRYLATE AND ACRYLONITRILE.
Claim 2
Dependent Claim
59 words
A PACKAGING MATERIAL COMPRISING A BASE SHEET HAVING AT LEAST SURFACE COATED WITH A COMPOSITION COMPRISING ESSENTIALLY A COPOLYMER OBTAINED FROM 80-96% BY WEIGHT OF VINYLIDENE CHLORIDE, 0.5-7% BY WEIGHT OF ISOPROPENYL ACETRATE AND 2-19.5% BY WEIGHT OF AT LEAST ONE OTHER POLYMERIZABLE MONO-OLEFINIC MONOMER COPOLYMERIZABLE WITH VINYLIDENE CHLORIDE SELECTED FROM THE GROUP CONSISTING OF ALKYL ACRYLATE AND ACRYLONITRILE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |