Patent US4468812A successfully refreshed from Google Patents.
US4468812A
Expired / Lapsed
US
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Flexible container
Assignee: Denso Marston Ltd
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Filing: 1983-01-17
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Granted: 1984-08-28
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Expires: 2003-01-17
Abstract
Abstract A flexible container for potable liquids, the container being of a fabric reinforced rubber body with an internal lining, the lining being bonded to the rubber and being formed of a non-orientated polypropylene. The potable liquid may be wine.
Inventors
- 👤 Ronald L. Grosvenor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:28
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/08; B32B27/00; B32B27/12; B32B25/18; B32B27/16; B32B27/32; B65; B65D; B65D31/00; B65D31/02; B32B2305/00; B32B2305/08; B32B2305/72; B32B2323/00; B32B2323/10; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1352; Y10T428/1362; Y10T428/19; Y10T428/192; Y10T428/197
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
26 words
A flexible container for a potable liquid comprising a fabric reinforced rubber body having a lining of a non-orientated polypropylene bonded to the fabric reinforced body.
Claim 2
Dependent Claim
26 words
A flexible container for a potable liquid comprising a fabric reinforced rubber body having a lining of a non-orientated polypropylene bonded to the fabric reinforced body.
Claim 3
Dependent Claim
20 words
A flexible container as claimed in claim 1 in which the fabric reinforcing the rubber body is a non-wick fabric.
Claim 4
Dependent Claim
43 words
A flexible container as claimed in claim 2 in which the fabric has warp threads and weft threads, the threads being filled with rubber, the arrangement being such that there are no longitudinal empty passages along and between the strands of the threads.
Claim 5
Dependent Claim
21 words
A flexible container as claimed in claim 1 in which the polypropylene is bonded to an uncured fabric reinforced rubber layer.
Claim 6
Dependent Claim
31 words
A flexible container as claimed in claim 4 in which the polypropylene is bonded by being calandered with the layer and being bonded to the rubber as the rubber is cured.
Claim 7
Dependent Claim
18 words
A flexible container as claimed in claim 1 in which the polypropylene layer is treated to enhance bonding.
Claim 8
Dependent Claim
17 words
A flexible container as claimed in claim 6 in which the treatment comprises an electric discharge treatment.
Claim 9
Dependent Claim
17 words
A flexible container as claimed in claim 1 in which the non-orientated polypropylene is a cast polypropylene.
Claim 10
Dependent Claim
81 words
A flexible container as claimed in claim 2 in which the container is formed of one or more strips of material, or is provided at one or more ends with joints between adjacent portions of lined fabric reinforced rubber material, wherein the improvement comprises a tape having a liner layer of polypropylene and a layer of rubber between the liner layer and the joint, the rubber being bonded to the inside of the joint and being free of fabric reinforcing threads.
Claim 11
Dependent Claim
15 words
A flexible container as claimed in claim 1 in which the rubber is butyl rubber.
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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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |