Patent US3075857A successfully refreshed from Google Patents.
US3075857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging products comprising coated polypropylene film
Assignee: Montedison SpA
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Filing: 1959-04-28
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Granted: 1963-01-29
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Expires: 1979-04-28
Abstract
No abstract record available.
Inventors
- 👤 Fior Aldo
- 👤 Lucchetti Luciano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:51
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08J5/12; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; C08J2351/00; C08J2351/06; Y; Y10; Y10S; Y10S8/00; Y10S8/09; Y10S8/18; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31757; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN IMPERMEABLE, MULTI-LAYER FILM COMPRISING A PRIMARY LAYER OF POLYPROPYLENE, SAID POLYPROPYLENE HAVING A CRYSTALLINITY AT ROOM TEMPERATURE OF AT LEAST 60% AS DETERMINED BY X-RAY ANALYSIS, AT LEAST ONE INTERMEDIATE LAYER ON THE SURFACE OF SAID PRIMARY LAYER, SAID INTERMEDIATE LAYER CONSISTING OF A CRAFT COPOLYMER OF ACRYLONITRILE AND POLYPROPYLENE, AND AT LEAST ONE SECONDARY LAYER ON THE SURFACE OF SAID INTERMEDIATE LAYER, SAID SECONDARY LAYER BEING SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL, POLYVINYL CHLORIDE, POLYVINYL ACETATE, POLYVINYL BUTYRAL, COPOLYMER OF VINYL CHLORIDE AND VINYL ACETATE, COPOLYMER OF VINYLIDENE AND VINYL CHLORIDE, AND COPOLYMER OF VINYLIDENCE CHLORIDE AND ACRYLONITRILE.
Claim 2
Dependent Claim
102 words
AN IMPERMEABLE, MULTI-LAYER FILM COMPRISING A PRIMARY LAYER OF POLYPROPYLENE, SAID POLYPROPYLENE HAVING A CRYSTALLINITY AT ROOM TEMPERATURE OF AT LEAST 60% AS DETERMINED BY X-RAY ANALYSIS, AT LEAST ONE INTERMEDIATE LAYER ON THE SURFACE OF SAID PRIMARY LAYER, SAID INTERMEDIATE LAYER CONSISTING OF A CRAFT COPOLYMER OF ACRYLONITRILE AND POLYPROPYLENE, AND AT LEAST ONE SECONDARY LAYER ON THE SURFACE OF SAID INTERMEDIATE LAYER, SAID SECONDARY LAYER BEING SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL, POLYVINYL CHLORIDE, POLYVINYL ACETATE, POLYVINYL BUTYRAL, COPOLYMER OF VINYL CHLORIDE AND VINYL ACETATE, COPOLYMER OF VINYLIDENE AND VINYL CHLORIDE, AND COPOLYMER OF VINYLIDENCE CHLORIDE AND ACRYLONITRILE.
References Cited (Backward Citations)
US2668134A
Cited
US2672427A
Cited
US2837496A
Cited
US2879177A
Cited
US2897092A
Cited
US2973241A
Cited
US2927047A
Cited
US2876358A
Cited
US2888367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |