US4696865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow copolyamide article
Assignee: Hoover Universal Inc
•
Filing: 1984-04-20
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Granted: 1987-09-29
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Expires: 2004-04-20
Abstract
Abstract A new article of manufacture in the form of a hollow, shaped, blow molded article formed of a composition comprising a copolyamide of hexamethylene terephthalamide and hexamethylene isophthalamide, the ratio of terephthalic acid to isophthalic acid used in forming the copolyamide being between about 1.0 to about 1.9. Such article may be formed from a precursor in the form of a hollow, shaped, tubular preform formed of such copolyamide composition.
Inventors
- 👤 John C. Richardson
- 👤 Morris Salame
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:55
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/0005; C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/265; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/31504; Y10T428/31725
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
90 words
A new article of manufacture comprising a hollow, shaped, blow molded article formed of a composition comprising a copolyamide of hexamethylene terephthalamide and hexamethylene isophthalamide, the ratio of terephthalic acid to isophthalic acid used in forming the copolyamide being between about 1.0 to about 1.9, said article having the following barrier properties: oxygen permeability no greater than ##EQU7## measured at 23° C., 50% relative humidity; water permeability no greater than ##EQU8## measured at 30° C., and hydrocarbon permeability as measured using heptane no greater than ##EQU9## measured at 23° C.
Claim 2
Dependent Claim
90 words
A new article of manufacture comprising a hollow, shaped, blow molded article formed of a composition comprising a copolyamide of hexamethylene terephthalamide and hexamethylene isophthalamide, the ratio of terephthalic acid to isophthalic acid used in forming the copolyamide being between about 1.0 to about 1.9, said article having the following barrier properties: oxygen permeability no greater than ##EQU7## measured at 23° C., 50% relative humidity; water permeability no greater than ##EQU8## measured at 30° C., and hydrocarbon permeability as measured using heptane no greater than ##EQU9## measured at 23° C.
Claim 3
Dependent Claim
13 words
The article of claim 1 wherein said ratio is between 1 to 1.5.
Claim 4
Dependent Claim
13 words
The article of claims 1, or 2 in the form of a container.
Claim 5
Dependent Claim
21 words
The article of claim 3 wherein a wall portion thereof has a crystallinity level of between about 20 to about 70%.
Claim 6
Dependent Claim
13 words
The article of claim 4 having been molded from a freely pendant parison.
Claim 7
Dependent Claim
11 words
The article of claim 5 in the form of a bottle.
Claim 8
Dependent Claim
88 words
A new article of manufacture comprising a hollow, shaped, tubular preform of a composition comprising a copolyamide of hexamethylene terephthalamide and hexamethylene isophthalamide, the ratio of terephthalic acid to isophthalic acid used in forming the copolyamide being between about 1.0 to about 1.9, said article having the following barrier properties: oxygen permeability no greater than ##EQU10## measured at 23° C., 50% relative humidity, water permeability no greater than ##EQU11## measured at 30° C., and hydrocarbon permeability as measured using heptane no greater than ##EQU12## measured at 23° C.
Claim 9
Dependent Claim
88 words
A new article of manufacture comprising a hollow, shaped, tubular preform of a composition comprising a copolyamide of hexamethylene terephthalamide and hexamethylene isophthalamide, the ratio of terephthalic acid to isophthalic acid used in forming the copolyamide being between about 1.0 to about 1.9, said article having the following barrier properties: oxygen permeability no greater than ##EQU10## measured at 23° C., 50% relative humidity, water permeability no greater than ##EQU11## measured at 30° C., and hydrocarbon permeability as measured using heptane no greater than ##EQU12## measured at 23° C.
Claim 10
Dependent Claim
13 words
The preform of claim 7 wherein said ratio is between 1 to 1.5.
Claim 11
Dependent Claim
13 words
The preform of claim 7, or 8 having been formed by injection molding.
Claim 12
Dependent Claim
52 words
A new article of manufacture comprising a hollow, shaped, blow molded article formed of capped copolyamide which has been polymerized in the solid state, said copolyamide comprising hexamethylene terephthalamide and hexamethylene isophthalamide, the ratio of terephthalic acid to isophthalic acid used in forming the copolyamide being between about 1.0 to about 1.9.
Claim 13
Dependent Claim
52 words
A new article of manufacture comprising a hollow, shaped, blow molded article formed of capped copolyamide which has been polymerized in the solid state, said copolyamide comprising hexamethylene terephthalamide and hexamethylene isophthalamide, the ratio of terephthalic acid to isophthalic acid used in forming the copolyamide being between about 1.0 to about 1.9.
Claim 14
Dependent Claim
20 words
The article of claim 10 wherein the copolyamide has an inherent viscosity of at least about 15. grams per deciliter.
Claim 15
Dependent Claim
48 words
The article of claim 10 having the following barrier properties: oxygen permeability no greater than ##EQU13## measured at 23° C., 50% relative humidity; water permeability no greater than ##EQU14## measured at 30° C. and hydrocarbon permeability as measured using heptane no greater than ##EQU15## measured at 23° C.
References Cited (Backward Citations)
US3597400A
Cited
US3549601A
Cited
US4022756A
Cited
JPS5250A
Cited
US4261473A
Cited
US4288478A
Cited
US4255560A
Cited
JPS6355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |