US4809876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container body having improved gas barrier properties
Assignee: Alcoa Corp
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Filing: 1987-08-27
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Granted: 1989-03-07
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Expires: 2007-08-27
Abstract
Abstract A container body for foods and beverages having reduced gas and vapor permeability. The container body is preferably formed from a plastic resin and coated with a thin film of diamond-like carbon.
Inventors
- 👤 Kathleen M. Tomaswick
- 👤 Alfred F. LaCamera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:57
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/04; B65; B65D; B65D65/00; B65D65/38; B65D65/42; B29C2949/00; B29C2949/07; B29C2949/079; B29C2949/08; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1379; Y10T428/30; Y10T428/31504; Y10T428/31801
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
49 words
A container body for food and beverage products comprising a hollow body having an open end, said body comprising a plastic resin or a wax having at least a portion coated with a film which imparts reduced gas and vapor permeability, said film comprising diamond-like carbon or diamond carbon.
Claim 2
Dependent Claim
49 words
A container body for food and beverage products comprising a hollow body having an open end, said body comprising a plastic resin or a wax having at least a portion coated with a film which imparts reduced gas and vapor permeability, said film comprising diamond-like carbon or diamond carbon.
Claim 3
Dependent Claim
24 words
The container body of claim 1 wherein said body is formed from a resin comprising a polyolefin, polyvinyl chloride, a polycarbonate, or a polyester.
Claim 4
Dependent Claim
27 words
The container body of claim 2 wherein said resin is selected from the group consisting of polypropylene, polyethylene, polypropylene/polyethylene copolymers, polyvinyl chloride, polyethylene terephthalate, and mixtures thereof.
Claim 5
Dependent Claim
16 words
The container body of claim 1 wherein said body is formed from biaxially oriented polyethylene terephthalate.
Claim 6
Dependent Claim
12 words
The container body of claim 1 wherein said film comprises diamond-like carbon.
Claim 7
Dependent Claim
18 words
The container body of claim 5 wherein said film has a thickness of at least about 10 angstroms.
Claim 8
Dependent Claim
16 words
The container body of claim 5 wherein said film has a thickness of about 5-2000 angstroms.
Claim 9
Dependent Claim
16 words
The container body of claim 5 wherein said film has a thickness of about 20-1500 angstroms.
Claim 10
Dependent Claim
19 words
The container body of claim 1 wherein said film overlies an outwardly facing exterior surface portion of the body.
Claim 11
Dependent Claim
19 words
The container body of claim 1 wherein said film overlies an inwardly facing interior surface portion of the body.
Claim 12
Dependent Claim
33 words
A food or beverage container comprising the container body of claim 1 in the form of a generally cylindrical tube having at least one end closed by a plastic or metal end closure.
Claim 13
Dependent Claim
17 words
The container body of claim 1 comprising a bottle having a neck terminating in an open end.
Claim 14
Dependent Claim
23 words
A food or beverage container comprising the container body of claim 12 and a plastic or metal end closure overlying said open end.
Claim 15
Dependent Claim
65 words
In a process for producing a plastic food or beverage container which includes the steps of (a) making a preform; (b) forming the preform into a container body having an outwardly facing exterior surface portion and an inwardly facing interior surface portion; the improvement comprising (c) coating the exterior surface portion or the interior surface portion with a film of diamond-like carbon or diamond carbon.
Claim 16
Dependent Claim
65 words
In a process for producing a plastic food or beverage container which includes the steps of (a) making a preform; (b) forming the preform into a container body having an outwardly facing exterior surface portion and an inwardly facing interior surface portion; the improvement comprising (c) coating the exterior surface portion or the interior surface portion with a film of diamond-like carbon or diamond carbon.
Claim 17
Dependent Claim
13 words
The process of claim 14 wherein step (c) is performed after step (b).
Claim 18
Dependent Claim
25 words
The process of claim 14 wherein step (b) comprises drawing and blowing the preform to produce a hollow body having at least one open end.
Claim 19
Dependent Claim
14 words
The process of claim 16 wherein step (b) is performed under biaxial orientation conditions.
Claim 20
Dependent Claim
23 words
The process of claim 14 wherein said container body consists essentially of a polyolefin, polyvinyl chloride, a polycarbonate, a polyester, or mixtures thereof.
Claim 21
Dependent Claim
15 words
The process of claim 14 wherein step (c) is performed by radio frequency glow discharge.
Claim 22
Dependent Claim
22 words
The process of claim 19 wherein step (c) is performed at reduced pressure in a chamber containing a hydrocarbon, fluorocarbon, or hydrofluorocarbon.
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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) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |