Patent US4188314A successfully refreshed from Google Patents.
US4188314A
Expired / Lapsed
US
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Shaped article obtained from a carbonate-polyester composition
Assignee: General Electric Co
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Filing: 1978-06-29
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Granted: 1980-02-12
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Expires: 1998-06-29
Abstract
Abstract A shaped article of an aromatic carbonate polymer and a polyester derived from cyclohexanedimethanol and a mixture of iso- and terephthalic acids.
Inventors
- 👤 Daniel W. Fox
- 👤 John A. Rock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:30
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L69/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
76 words
A shaped article in the form of a substantially transparent sheet having enhanced chemical resistance which consists of: (a) from 25 to 98 parts by weight of an aromatic carbonate polymer; and (b) from 2 to 75 parts by weight of a polyester polymer derived from cyclohexanedimethanol and a mixture of iso- and terephthalic acids wherein said mixtures contain from about 5% to about 90% isophthalic acid and from about 95% to about 10% terephthalic acid.
Claim 2
Dependent Claim
76 words
A shaped article in the form of a substantially transparent sheet having enhanced chemical resistance which consists of: (a) from 25 to 98 parts by weight of an aromatic carbonate polymer; and (b) from 2 to 75 parts by weight of a polyester polymer derived from cyclohexanedimethanol and a mixture of iso- and terephthalic acids wherein said mixtures contain from about 5% to about 90% isophthalic acid and from about 95% to about 10% terephthalic acid.
Claim 3
Dependent Claim
83 words
A shaped article as defined in claim 1 wherein the polycarbonate has recurring units of the formula: ##STR9## wherein each --R-- is selected from the group consisting of phenylene, halo-substituted phenylene and alkyl substituted phenylene, and A and B are each selected from the group consisting of hydrogen, hydrocarbon radicals free from aliphatic unsaturation and of radicals which together and with the adjoining ##STR10## atom form a cycloalkane radical, the total number of carbon atoms in A and B being up to 12.
Claim 4
Dependent Claim
16 words
A shaped article as defined in claim 2 wherein the polycarbonate has the repeating unit ##STR11##
Claim 5
Dependent Claim
17 words
A shaped article as defined in claim 1 wherein the polyester polymer has the repeating unit: ##STR12##
Claim 6
Dependent Claim
85 words
A shaped article having enhanced chemical and impact resistance which consists of: (a) from 25 to 98 parts by weight of an aromatic carbonate polymer; (b) from 2 to 75 parts by weight of a polyester polymer derived from cyclohexanedimethanol and a mixture of terephthalic and isophthalic acids wherein said mixtures contain from about 5% to about 90% isophthalic acid and from about 95% to about 10% terephthalic acid; (c) from 1 to 60 parts by weight of a reinforcing amount of a reinforcing filler.
Claim 7
Dependent Claim
85 words
A shaped article having enhanced chemical and impact resistance which consists of: (a) from 25 to 98 parts by weight of an aromatic carbonate polymer; (b) from 2 to 75 parts by weight of a polyester polymer derived from cyclohexanedimethanol and a mixture of terephthalic and isophthalic acids wherein said mixtures contain from about 5% to about 90% isophthalic acid and from about 95% to about 10% terephthalic acid; (c) from 1 to 60 parts by weight of a reinforcing amount of a reinforcing filler.
Claim 8
Dependent Claim
82 words
A shaped article as defined in claim 5 wherein the polycarbonate has recurring units of the formula: ##STR13## wherein each --R-- is selected from the group consisting of phenylene, halo-substituted phenylene and alkyl substituted phenylene and A and B are each selected from the group consisting of hydrogen, hydrocarbon radicals free from aliphatic unsaturation and of radicals which together with the adjoining ##STR14## atom form a cycloalkane radical, the total number of carbon atoms in A and B being up to 12.
Claim 9
Dependent Claim
16 words
A shaped article as defined in claim 6 wherein the polycarbonate has the repeating unit ##STR15##
Claim 10
Dependent Claim
17 words
A shaped article as defined in claim 7 wherein the polyester polymer has the repeating unit: ##STR16##
Claim 11
Dependent Claim
15 words
A shaped article as defined in claim 5 wherein the reinforcing filler is glass filler.
Claim 12
Dependent Claim
19 words
A shaped article as defined in claim 5 wherein said shaped article is in the form of a sheet.
Claim 13
Dependent Claim
19 words
A shaped article as defined in claim 5 wherein said shaped article is in the form of a helmet.
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) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |