US4626456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminate structure for collapsible dispensing container
Assignee: Primerica Inc
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Filing: 1985-04-30
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Granted: 1986-12-02
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Expires: 2005-04-30
Abstract
Abstract A plastic laminate sheet for making collapsible dispensing container comprises an outer layer of filled-plastic made of polypropylene or a blend of polypropylene, and high density polyethylene, and a filler, preferably calcium carbonate, incorporated therein. The outer filled-plastic layer is coextensively bonded to an inner layer of high density polyethylene to form the laminate sheet. An intermediate layer of an oxygen barrier plastic may be interposed in the laminate sheet in order to impart oxygen impermeability thereto.
Inventors
- 👤 Christopher J. Farrell
- 👤 Mark A. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:50
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/18; B32B27/20; B65; B65D; B65D35/00; B65D35/02; B65D35/04; B65D35/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/2457; Y10T428/25; Y10T428/251; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
112 words
A crease-retaining plastic laminate sheet useful for making collapsible dispensing container, said laminate sheet comprising an outer layer of a filled plastic material coextensively bonded to an inner plastic layer, wherein said filled plastic material comprises a polymer selected from the group consisting of polypropylene, high impact grade polypropylene and a blend of polypropylene or high impact grade polypropylene with high density polyethylene, and from about 5 to about 80 percent by weight, based on said filled plastic material, of a filler selected from the group consisting of calcium carbonate, talc, mica, glass powder, metal powder and mixtures thereof, and wherein said inner plastic layer is made essentially of high density polyethylene.
Claim 2
Dependent Claim
112 words
A crease-retaining plastic laminate sheet useful for making collapsible dispensing container, said laminate sheet comprising an outer layer of a filled plastic material coextensively bonded to an inner plastic layer, wherein said filled plastic material comprises a polymer selected from the group consisting of polypropylene, high impact grade polypropylene and a blend of polypropylene or high impact grade polypropylene with high density polyethylene, and from about 5 to about 80 percent by weight, based on said filled plastic material, of a filler selected from the group consisting of calcium carbonate, talc, mica, glass powder, metal powder and mixtures thereof, and wherein said inner plastic layer is made essentially of high density polyethylene.
Claim 3
Dependent Claim
17 words
A plastic laminate sheet as in claim 1 wherein the polymer of said outer layer is polypropylene.
Claim 4
Dependent Claim
20 words
A plastic laminate sheet as in claim 1 wherein the polymer of said outer layer is high impact grade polypropylene.
Claim 5
Dependent Claim
24 words
A plastic laminate sheet as in claim 1 wherein the polymer of said outer layer is a blend of polypropylene and high density polyethylene.
Claim 6
Dependent Claim
27 words
A plastic laminate sheet as in claim 1 wherein the polymer of said outer layer is a blend of high impact grade polypropylene and high density polyethylene.
Claim 7
Dependent Claim
22 words
A plastic laminate sheet as in claims 1, 2, 3, 4 or 5 wherein said outer layer has a grooved outer surface.
Claim 8
Dependent Claim
19 words
A plastic laminate sheet as in claims 1, 2, 3, 4 or 5 wherein said filler is calcium carbonate.
Claim 9
Dependent Claim
14 words
A plastic laminate sheet as in claim 6 wherein said filler is calcium carbonate.
Claim 10
Dependent Claim
138 words
A crease-retaining plastic laminate sheet useful for making collapsible dispensing container, said laminate sheet comprising outer layer of a filled plastic material, an intermediate layer of oxygen-impermeable material, a first adhesive layer for coextensively bonding said outer layer to said intermediate layer and a second adhesive layer for coextensively bonding said inner layer to said intermediate layer, wherein said filled plastic material comprises a polymer selected from the group consisting of polypropylene, high impact grade polypropylene and a blend of polypropylene or high impact grade polypropylene with high density polyethylene, and from about 5 to 80 percent by weight, based on said filled plastic material, of a filler selected from the group consisting of calcium carbonate, talc, mica, glass powder, metal powder and mixtures thereof, and wherein said inner plastic layer is made essentially of high density polyethylene.
Claim 11
Dependent Claim
138 words
A crease-retaining plastic laminate sheet useful for making collapsible dispensing container, said laminate sheet comprising outer layer of a filled plastic material, an intermediate layer of oxygen-impermeable material, a first adhesive layer for coextensively bonding said outer layer to said intermediate layer and a second adhesive layer for coextensively bonding said inner layer to said intermediate layer, wherein said filled plastic material comprises a polymer selected from the group consisting of polypropylene, high impact grade polypropylene and a blend of polypropylene or high impact grade polypropylene with high density polyethylene, and from about 5 to 80 percent by weight, based on said filled plastic material, of a filler selected from the group consisting of calcium carbonate, talc, mica, glass powder, metal powder and mixtures thereof, and wherein said inner plastic layer is made essentially of high density polyethylene.
Claim 12
Dependent Claim
17 words
A plastic laminate sheet as in claim 9 wherein the polymer of said outer layer is polypropylene.
Claim 13
Dependent Claim
20 words
A plastic laminate sheet as in claim 9 wherein the polymer of said outer layer is high impact grade polypropylene.
Claim 14
Dependent Claim
24 words
A plastic laminate sheet as in claim 9 wherein the polymer of said outer layer is a blend of polypropylene and high density polyethylene.
Claim 15
Dependent Claim
27 words
A plastic laminate sheet as in claim 9 wherein the polymer of said outer layer is a blend of high impact grade polypropylene and high density polyethylene.
Claim 16
Dependent Claim
22 words
A plastic laminate sheet as in claims 9, 10, 11, 12 or 13, wherein said outer layer has a grooved outer surface.
Claim 17
Dependent Claim
19 words
A plastic laminate sheet as in claims 9, 10, 11, 12 or 13 wherein said filler is calcium carbonate.
Claim 18
Dependent Claim
14 words
A plastic laminate sheet as in claim 14 wherein said filler is calcium carbonate.
Claim 19
Dependent Claim
33 words
A plastic laminate sheet as in claims 1, 2, 3, 4 or 5 wherein the laminate sheet further comprises an oxygen barrier layer coextensively bonded to the outer surface of said outer layer.
Claim 20
Dependent Claim
33 words
A plastic laminate sheet as in claims 1, 2, 3, 4 or 5 wherein the laminate sheet further comprises an oxygen barrier layer coextensively bonded to the inner surface of said inner layer.
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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) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |