Patent US4816308A successfully refreshed from Google Patents.
US4816308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayered container
Assignee: Mitsubishi Gas Chemical Co Inc
•
Filing: 1987-12-21
•
Granted: 1989-03-28
•
Expires: 2007-12-21
Abstract
Abstract A biaxially oriented multilayered container consisting of a body portion and a mouth portion. The body portion comprises one or more layers of a thermoplastic gas-barrier resin B and layers of a thermoplastic resin A other than the resin B which are larger in number than the resin B layers by 1, the resin A and B layers being laminated alternately, and at least the open end part of said mouth portion is composed of a single layer of the resin A. As a characteristic feature, a coarsely mixed resin layer of resins A and B in which the proportion of resin particles having a long diameter of not more than 10 μm is not more than 10% exists in at least one of the boundaries between the resin A and B layers.
Inventors
- 👤 Senzo Shimizu
- 👤 Yoshiaki Momose
- 👤 Yozo Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:25
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/34; B32B27/36; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/28; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2367/00; B32B2377/00; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31725; Y10T428/31736; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
A biaxially oriented multilayered container consisting of a body portion and a mouth portion, said body portion comprising one or more layers of a thermoplastic gas-barrier resin (resin B) and layers of a thermoplastic resin (resin A) other than the resin B, the number of the resin A layers being larger than that of the resin B layers by one, said resin A and B layers being laminated alternately, and at least the open end part of said mouth portion being composed of a single layer of the resin A; wherein a coarsely mixed resin layer of resins A and B in which the proportion of resin particles having a long diameter of not more than 10 μm is not more than 10% exists in at least one of the boundaries between the resin A and B layers.
Claim 2
Dependent Claim
138 words
A biaxially oriented multilayered container consisting of a body portion and a mouth portion, said body portion comprising one or more layers of a thermoplastic gas-barrier resin (resin B) and layers of a thermoplastic resin (resin A) other than the resin B, the number of the resin A layers being larger than that of the resin B layers by one, said resin A and B layers being laminated alternately, and at least the open end part of said mouth portion being composed of a single layer of the resin A; wherein a coarsely mixed resin layer of resins A and B in which the proportion of resin particles having a long diameter of not more than 10 μm is not more than 10% exists in at least one of the boundaries between the resin A and B layers.
Claim 3
Dependent Claim
56 words
The multilayered container of claim 1 wherein the body portion is composed of 1 to 3 layers of the resin B, 2 to 4 layers of the resin A, and the coarsely mixed resin layer of the resins A and B existing in at least one of the boundaries between the resin A and B layers.
Claim 4
Dependent Claim
52 words
The multilayered container of claim 1 wherein the body portion is composed of 3 layers of the resin A, 2 layers of the resin B, and the coarsely mixed resin layer of the resins A and B existing in at least one of the boundaries between the resin A and B layers.
Claim 5
Dependent Claim
52 words
The multilayered container of claim 1 wherein the body portion is composed of 2 layers of the resin A, 1 layer of the resin B, and the coarsely mixed resin layer of the resins A and B existing in at least one of the boundaries between the resin A and B layers.
Claim 6
Dependent Claim
27 words
The multilayered container of claim 1 wherein the resin A is a thermoplastic polyester resin and the resin B is a polyamide resin containing a m-xylylene group.
Claim 7
Dependent Claim
29 words
The multilayered container of claim 1 wherein in said coarsely mixed resin layer, the weight ratio of the resin A to the resin B is from 8:2 to 2:8.
Claim 8
Dependent Claim
20 words
The multilayered container of claim 1 wherein said coarsely mixed resin layer has a thickness of 5 to 100 μm.
Claim 9
Dependent Claim
18 words
The multilayered container of claim 1 wherein the body portion has a thickness of 150 to 2,000 μm.
Claim 10
Dependent Claim
31 words
The multilayered container of claim 1 wherein the amount of the resin B used is 1 to 50% by volume based on the total volume of the resins constituting the container.
References Cited (Backward Citations)
GB2006108A
Cited
US4535901A
Cited
US4528219A
Cited
US4564541A
Cited
US4741936A
Cited
US4728549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |