US3707393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated paper sheet and method for making
Assignee: EIDP Inc
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Filing: 1971-02-23
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Granted: 1972-12-26
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Expires: 1991-02-23
Abstract
Abstract A SHEET MATERIAL HAVING HEAT SEAL PROPERTIES IS PROVIDED BY PRECOATING A PAPER SUBSTRATE WITH A MIXTURE COMPRISING (A) A COPOLYMER OF ETHYLENE AND AN ALPHA, BETA ETHYLENICALLY UNSATURATED CARBOXYLIC ACID IN WHICH THE CARBOXYLIC ACID GROUPS ARE PARTIALLY NEUTRALIZED, AND (B) A COPOLYMER OF ETHYLENE AND A VINYL ALKANOATE AND FROM 0 TO ABOUT 10% OF AN ALPHA, BETA ETHYLENICALLY UNSATURATED CARBOXYLIC ACID, AND APPLYING A TOP COATING OF POLYVINYLIDENE CHLORIDE.
Inventors
- 👤 John William Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:28
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; D21H19/824; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1038; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31909; Y10T428/31913; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |