US3922473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated film
Assignee: Tosoh Corp
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Filing: 1973-10-02
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Granted: 1975-11-25
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Expires: 1993-10-02
Abstract
Abstract A laminated film which comprises a film substrate, an adhesive undercoat of a carboxylated ethylene copolymer composition prepared by copolymerizing a monomer mixture of an Alpha , Beta -unsaturated carboxylic acid or anhydride and at least one vinylidene monomer of the formula CH2 CXY where X and Y are the same or different and each represents hydrogen, chlorine, a lower alkyl containing 1-6 carbon atoms, acetoxy, or a carboxylic ester group in the presence of an ethylene-vinylacetate copolymer applied to said film substrate, and a top film of a polyolefin or ethylene copolymer applied to said adhesive undercoat.
Inventors
- 👤 Yujiro Kosaka
- 👤 Masaru Uemura
- 👤 Tokio Fujiki
- 👤 Mitsutaka Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:42
CPC Classifications
B; B32; B32B; B32B27/00; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/20; B32B27/06; B32B27/08; B32B27/10; B32B27/30; B32B27/304; B32B27/32; B32B27/34; B32B27/36; B32B7/00; B32B7/04; B32B7/12; B32B2255/00; B32B2255/06; B32B2255/10; B32B2255/12; B32B2255/26; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2307/54; B32B2307/70; B32B2307/748; B32B2439/00; B32B2553/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31725; Y10T428/3175; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A LAMINATED FILM WHICH COMPRISES: A FILM SUBSTRATE WHEREIN SAID FILM SUBSTRATE IS ALUMINUM FOIL, BIAXIALLY STRETCHED POLYPROPYLENE FILM, UNSTRETCHED POLYPROPYLENE FILM, POLYESTER FILM, POLYAMIDE FILM, POLYETHYLENE FILM, CELLOPHANE, POLYVINYLCHLORIDE OR KRAFT PAPER AND WHEREIN SAID TOP FILM IS POLYETHYLENE, POLYPROPYLENE, AN ETHYLENE-VINYLACETATE COPOLYMER OR AN ETHYLENEPROPYLENE COPOLYMER; AN ADHESIVE UNDERCOAT OF A CARBOXYLATED ETHYLENE COPOLYMER COMPOSITION PREPARED BY COPOLYMERIZING A MONOMER MIXTURE OF AN A,B-UNSATURATED CARBOXYLIC ACID OR ANHYDRIDE AND AT LEAST ONE VINYLIDENE MONOMER OF THE FORMULA
Claim 2
Dependent Claim
79 words
A LAMINATED FILM WHICH COMPRISES: A FILM SUBSTRATE WHEREIN SAID FILM SUBSTRATE IS ALUMINUM FOIL, BIAXIALLY STRETCHED POLYPROPYLENE FILM, UNSTRETCHED POLYPROPYLENE FILM, POLYESTER FILM, POLYAMIDE FILM, POLYETHYLENE FILM, CELLOPHANE, POLYVINYLCHLORIDE OR KRAFT PAPER AND WHEREIN SAID TOP FILM IS POLYETHYLENE, POLYPROPYLENE, AN ETHYLENE-VINYLACETATE COPOLYMER OR AN ETHYLENEPROPYLENE COPOLYMER; AN ADHESIVE UNDERCOAT OF A CARBOXYLATED ETHYLENE COPOLYMER COMPOSITION PREPARED BY COPOLYMERIZING A MONOMER MIXTURE OF AN A,B-UNSATURATED CARBOXYLIC ACID OR ANHYDRIDE AND AT LEAST ONE VINYLIDENE MONOMER OF THE FORMULA
Claim 3
Dependent Claim
45 words
The laminated film of claim 1, wherein said Alpha , Beta -unsaturated carboxylic acid or anhydride is acrylic, methacrylic, maleic, fumaric, itaconic acid or anhydride and said vinylidene monomer is ethylene, propylene, isobutene, butene-1, octene-1, vinylchcloride, vinylacetate, lower alkylesters of acrylic acid or methacrylic acid.
Claim 4
Dependent Claim
50 words
The laminated film of claim 1, wherein said carboxylated ethylene copolymer composition is applied as an undercoat on said film substrate as a solution prepared by dissolving said carboxylated ethylene copolymer composition in a solvent of hexane, heptane, benzene, toluene, xylene, ethyl acetate, ethylenedichloride, propylenedichloride, trichloroethylene, trichloroethane, dioxane or tetrahydrofuran.
Claim 5
Dependent Claim
13 words
The laminated film of claim 1, wherein said film substrate is aluminum foil.
Claim 6
Dependent Claim
36 words
The laminated film of claim 1, wherein said film substrate is biaxially stretched polypropylene film, unstretched polypropylene film or polyethylene film, and wherein said top film is polyethylene film, polypropylene film or an ethylene-propylene copolymer film.
Claim 7
Dependent Claim
20 words
The laminated film of claim 1, wherein said film substrate is polyester film, polyamide film, cellophane, polyvinylchloride or kraft paper.
Claim 8
Dependent Claim
15 words
The laminated film of claim 1, wherein said top film is an ethylene vinylacetate copolymer.
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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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |