US4846362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene closure with removable liner
Assignee: BPrex Healthcare Brookville Inc
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Filing: 1988-03-04
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Granted: 1989-07-11
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Expires: 2008-03-04
Abstract
Abstract A polyethylene compression-molded closure with an elastomer liner that is removable, the elastomer being a blend of polypropylene and a rubbery copolymer.
Inventors
- 👤 Francis M. Schloss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:40
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0435; B65D41/045; B65D53/00; B65D53/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
38 words
A polyethylene closure with a top and a depending skirt, a removable liner for the top of the closure that is compression molded into the closure, the liner being a blend of polypropylene and a thermoplastic elastomeric copolymer.
Claim 2
Dependent Claim
38 words
A polyethylene closure with a top and a depending skirt, a removable liner for the top of the closure that is compression molded into the closure, the liner being a blend of polypropylene and a thermoplastic elastomeric copolymer.
Claim 3
Dependent Claim
28 words
A closure as defined in claim 1 in which the copolymer is a block copolymer of styrene and butadiene; the blend also containing mineral oil or petroleum oil.
Claim 4
Dependent Claim
20 words
A closure as defined in claim 1 in which the copolymer is a block copolymer of styrene and ethylene butylene.
Claim 5
Dependent Claim
19 words
A closure device as defined in claim 1 in which the elastomer is a copolymer of ethylene and propylene.
Claim 6
Dependent Claim
34 words
A closure device as defined in claim 1 in which the copolymer is about 40 to 80 wt. % of the blend and polypropylene is about 20 to 60 wt. % of the blend.
Claim 7
Dependent Claim
23 words
A closure device as defined in claim 1 in which the blend is about 60% of the copolymer and about 40% of polypropylene.
Claim 8
Independent Claim
60 words
A method of lining a polyethylene closure having a top closure with an inner wall and an outer wall so that the lining can be removed, the method comprising: lining by compression molding, the inner wall of the closure top with an elastomeric removable liner that is a blend of polypropylene and a copolymer of styrene and a copolymerizable monomer.
Claim 9
Independent Claim
60 words
A method of lining a polyethylene closure having a top closure with an inner wall and an outer wall so that the lining can be removed, the method comprising: lining by compression molding, the inner wall of the closure top with an elastomeric removable liner that is a blend of polypropylene and a copolymer of styrene and a copolymerizable monomer.
Claim 10
Dependent Claim
18 words
A method as defined in claim 7 in which the blend also contains mineral oil or petroleum oil.
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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |