US3676185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sealable moistureproof wrapping material
Assignee: British Cellophane Ltd
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Filing: 1970-03-12
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Granted: 1972-07-11
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Expires: 1990-03-12
Abstract
Abstract THE INVENTION RELATES TO HEAT-SEALABLE MOISTUREPROOF SHEET MATERIALS. A BASE SHEET IS COATED ON EACH SIDE WITH A SUB-COATING OF A VINYLIDENE CHLORIDE COPOLYMER HAVING A VINYLIDENE CHLORIDE CONTENT OF FROM 93 TO 96% BY WEIGHT AND HAVING A SUM TOTAL WEIGHT OF COATING ON BOTH SIDES OF THE SHEET OF FROM 2.0 TO 10.0 GRAMS PER SQUARE METRE. THE SUB-COATING IS OVERLAIN WITH A TOP COATING COMPRISING A VINYLIDENE CHLORIDE COPOLYMER HAVING A VINYLIDENE CHLORIDE CONTENT OF FROM 80 TO 92% BY WEIGHT AND HAVING A SUM TOTAL WEIGHT OF TOP COATING ON BOTH SIDES OF THE SHEET OF FROM 1.0 TO 5.0 GRAMS PER SQUARE METRE. THE SHEET MATERIALS ARE USEFUL AS WRAPPING MATERIALS.
Inventors
- 👤 Cyril Howard Phillips
- 👤 James Charles Brunton
- 👤 Geoffrey Downing Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:12
CPC Classifications
B; B29; B29D; B29D7/00; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/044; C08J7/046; C08J7/048; C08J7/052; B29C; B29C71/00; C08J2301/00; C08J2301/02; C08J2427/00; C08J2427/02; C08J2427/04; C08J2427/08; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2835; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |