Patent US4818577A successfully refreshed from Google Patents.
US4818577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic liner capable of resisting chemical attack and high temperature
Assignee: Selig Sealing Products Inc
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Filing: 1987-08-20
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Granted: 1989-04-04
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Expires: 2007-08-20
Abstract
Abstract A liner, suitable for use with caps for containers, comprising a layer of compressible polymeric foam, a layer of adhesive in contact with and coextensive with said foam layer, and a layer of polymeric film in contact with and coextensive with said layer of adhesive. The liner shows good chemical resistance, good resistance to high temperatures, and good impermeability to gases.
Inventors
- 👤 Daivd T. Ou-Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:33
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B27/00; B32B27/06; B32B27/065; B32B27/28; B32B27/281; B32B27/283; B32B27/32; B32B27/322; B32B27/36; B32B7/00; B32B7/04; B32B7/12; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0435; B65D41/045; B65D51/00; B65D51/18; B65D51/20; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/025; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2327/00; B32B2327/12; B32B2327/18; B32B2367/00; B32B2379/00; B32B2379/08; B32B2383/00; B32B2435/00; B32B2435/02; B32B2439/00; B32B2439/70; B32B2439/80; B65D2251/00; B65D2251/0003; B65D2251/0006; B65D2251/0015; B65D2251/0068; B65D2251/0093; B65D2251/20; B65D2251/205; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249985; Y10T428/249987; Y10T428/24999; Y10T428/249991; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31652; Y10T428/31663; Y10T428/31721; Y10T428/31786; Y10T428/31826; Y10T428/31855; Y10T428/31931
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
83 words
Liner suitable for a cap for a container consisting of: (a) a layer of compressible polymeric foam, said layer of foam comprising a polymer or copolymer of olefin, (b) a layer of adhesive in contact with and coextensive with said layer of foam, and (c) a layer of polymeric film in contact with and coextensive with said layer of adhesive, said layer of film being made of a material selected from the group consisting of crystalline and semicrystalline polyesters, silicones, polytetrafluoroethylenes, and polyimides.
Claim 2
Dependent Claim
83 words
Liner suitable for a cap for a container consisting of: (a) a layer of compressible polymeric foam, said layer of foam comprising a polymer or copolymer of olefin, (b) a layer of adhesive in contact with and coextensive with said layer of foam, and (c) a layer of polymeric film in contact with and coextensive with said layer of adhesive, said layer of film being made of a material selected from the group consisting of crystalline and semicrystalline polyesters, silicones, polytetrafluoroethylenes, and polyimides.
Claim 3
Dependent Claim
23 words
The liner of claim 1 wherein said layer of polymeric foam has a thickness ranging from about 2 mil to about 60 mil.
Claim 4
Dependent Claim
52 words
The liner of claim 1 wherein said layer of polymeric foam is sufficiently compressible that said liner having dimensions of 38 mm and a thickness of 45 mils can recover at least 30% when a force of 20 in.-lb. of torque is applied to said cap and said container for one minute.
Claim 5
Dependent Claim
14 words
The liner of claim 1 wherein said polymeric foam is an open cell foam.
Claim 6
Dependent Claim
23 words
The liner of claim 1 wherein said layer of polymeric film has a thickness ranging from about 0.2 mil to about 5 mils.
Claim 7
Dependent Claim
25 words
The liner of claim 1 wherein said layer of polymeric film is comprised of polymeric material having a melting point of at least 130° C.
Claim 8
Dependent Claim
24 words
The liner of claim 1 wherein said layer of polymeric film has an oxygen transmission rate not in excess of 60 cc/100 sq. in./day.
Claim 9
Dependent Claim
14 words
The liner of claim 1 wherein said layer of adhesive comprises a pressure-sensitive adhesive.
Claim 10
Dependent Claim
14 words
The liner of claim 1 wherein said layer of adhesive comprises a polyolefin-based adhesive.
Claim 11
Dependent Claim
14 words
The liner of claim 1 wherein said layer of adhesive comprises a rubber-based adhesive.
Claim 12
Dependent Claim
15 words
The liner of claim 1 wherein said layer of adhesive comprises an acrylic polymer-based adhesive.
Claim 13
Dependent Claim
15 words
A cap for a container, said cap having the liner of claim 1 inserted therein.
Claim 14
Dependent Claim
15 words
A container having a cap, said cap having the liner of claim 1 inserted therein.
Claim 15
Dependent Claim
11 words
The liner of claim 1 in the shape of a disc.
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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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |