US4482695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide containers having improved gas barrier properties
Assignee: Eastman Chemical Co
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Filing: 1983-11-14
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Granted: 1984-11-13
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Expires: 2003-11-14
Abstract
Abstract The present invention provides containers having unexpectedly superior gas barrier properties. The containers are formed from specified polyamides which comprise an aliphatic diamine and a diacid component which comprises a dicarboxylic acid containing a hetero atom.
Inventors
- 👤 Robert B. Barbee
- 👤 Roy K. Bass
- 👤 Burns Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:01
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/42; C08G69/40; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31739
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
A container having an oxygen transmission rate of less than about 1.0 cc.mil/100 in. 2 .24 hr.atm which is formed from a polyamide comprising the reaction product of (A) m-xylylenediamine, p-xylylenediamine, or a mixture thereof, and (B) oxydiacetic acid, 1,4-phenylenedioxydiacetic acid, 1,3-phenylenedioxydiacetic acid, or a mixture thereof.
Claim 2
Dependent Claim
47 words
A container having an oxygen transmission rate of less than about 1.0 cc.mil/100 in. 2 .24 hr.atm which is formed from a polyamide comprising the reaction product of (A) m-xylylenediamine, p-xylylenediamine, or a mixture thereof, and (B) oxydiacetic acid, 1,4-phenylenedioxydiacetic acid, 1,3-phenylenedioxydiacetic acid, or a mixture thereof.
Claim 3
Dependent Claim
20 words
The container of claim 1 wherein said oxygen transmission rate is less than about 0.7 cc.mil/100 in. 2 .24 hr.atm.
Claim 4
Dependent Claim
17 words
The container of claim 1 wherein said polyamide comprises the reaction product of oxydiacetic acid and m-xylylenediamine.
Claim 5
Dependent Claim
15 words
The container of claim 1 wherein said container is a film formed from said polyamide.
Claim 6
Dependent Claim
15 words
The container of claim 1 wherein said container is a coextruded article comprising said polyamide.
Claim 7
Dependent Claim
15 words
The container of claim 1 wherein said container is a laminated article comprising said polyamide.
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) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |