Patent US3874989A successfully refreshed from Google Patents.
US3874989A
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Composite film and sheeting
Assignee: BASF SE
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Filing: 1972-12-18
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Granted: 1975-04-01
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Expires: 1992-12-18
Abstract
Abstract Composite film or sheeting consisting of (a) at least one ply (A) of polybutylene terephthalate; (b) at least one ply (B) of a thermoplastics material or a metal suitable for the production of foil; and (c) a layer (C) of adhesive between the plies (A) and (B).
Inventors
- 👤 Karl Stange
- 👤 Alfred Hofmann
- 👤 Hans-Peter Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:24
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/36; B32B15/00; B32B15/04; B32B15/08; B32B15/09; B32B15/18; B32B15/20; B32B27/30; B32B27/302; B32B27/304; B32B27/306; B32B27/32; B32B27/34; B32B7/00; B32B7/04; B32B7/12; B32B37/00; B32B37/12; B32B37/1207; B32B2037/1215; B32B2250/00; B32B2250/02; B32B2250/24; B32B2311/00; B32B2311/12; B32B2311/14; B32B2311/24; B32B2311/30; B32B2323/00; B32B2323/04; B32B2323/10; B32B2325/00; B32B2327/00; B32B2327/06; B32B2331/00; B32B2331/04; B32B2367/00; B32B2377/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31562; Y10T428/31565; Y10T428/31573; Y10T428/31576; Y10T428/3158; Y10T428/31587; Y10T428/31591; Y10T428/31605; Y10T428/31678; Y10T428/31692; Y10T428/31725; Y10T428/31736; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A COMPOSITE FILM OR SHEETING COMPRISING (A) AT LEAST ONE POLY (A) CONSISTING OF POLYBUTYLENE TEREPHTHALATE: )B) AT LEAST ONE PLY (B) BONDED TO SAID PLY (A) OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE OF A DENSITY OF FROM 0.92 TO 0.96 G/CCM, POLYPROPYLENE, ETHYLENE/VINYL ACETATE COPOLYMERS, POLYSTYRENE, POLYAMIDES, POLYMERS BASED ON CELLULOSE AND CELLULOSE ACETATE, POLYVINYL CHLORIDE, ALUMINUM, COPPER LEAD AND STEEL, AND (C) AT LAST ONE PLY (C) OF A HOT MELT ADHESIVE BONDING PLY (B) TO PLY (A) SELECTED FROM THE GROUP CONSISTING OF ETHYLENE AND URETHANE BASED POLYMERS CONTAINING POLAR GROUPS.
Claim 2
Dependent Claim
98 words
A COMPOSITE FILM OR SHEETING COMPRISING (A) AT LEAST ONE POLY (A) CONSISTING OF POLYBUTYLENE TEREPHTHALATE: )B) AT LEAST ONE PLY (B) BONDED TO SAID PLY (A) OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE OF A DENSITY OF FROM 0.92 TO 0.96 G/CCM, POLYPROPYLENE, ETHYLENE/VINYL ACETATE COPOLYMERS, POLYSTYRENE, POLYAMIDES, POLYMERS BASED ON CELLULOSE AND CELLULOSE ACETATE, POLYVINYL CHLORIDE, ALUMINUM, COPPER LEAD AND STEEL, AND (C) AT LAST ONE PLY (C) OF A HOT MELT ADHESIVE BONDING PLY (B) TO PLY (A) SELECTED FROM THE GROUP CONSISTING OF ETHYLENE AND URETHANE BASED POLYMERS CONTAINING POLAR GROUPS.
Claim 3
Dependent Claim
36 words
A composite film or sheeting as set forth in claim 1 in which ply (B) consists of a polyamide selected from the group consisting of polycaprolactam, polycapryllactam, polylaurolactam, polyenantholactam, nylon-6,10, nylon-6,12, poly-11-aminoundecanoic acid and copolymers thereof.
Claim 4
Dependent Claim
19 words
A composite film or sheeting as set forth in claim 1 in which ply (B) consists of a polyolefin.
Claim 5
Dependent Claim
72 words
A composite film or sheeting as set forth in claim 1 in which layer (C) consists of a carboxyl-containing ethylene copolymer containing from 60 to 90% by weight of ethylene units, from 0.5 to 20% by weight of units of an ethylenically unsaturated carboxylic acid, from 0.5 to 20% by weight of units of an ester of an ethylenically unsaturated carboxylic acid and from 0.3 to 5% by weight of isobutylene units.
Claim 6
Dependent Claim
22 words
A composite film or sheeting as set forth in claim 1 wherein at least one of said ply (B) is aluminum foil.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |