Patent US6290696B1 successfully refreshed from Google Patents.
US4045431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible polyester having a melting point of at least 140° C.
Assignee: Eastman Chemical Co
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Filing: 1975-12-11
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Granted: 1977-08-30
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Expires: 1995-12-11
Abstract
Abstract Disclosed is a polyester comprised of 1,4-cyclohexanedimethanol, a major portion of 1,4-cyclohexanedicarboxylic acid and a minor portion of dimer acid. Films of this polyester exhibit an unobvious combination of flexibility and high melting point and are particularly adapted for packaging applications.
Inventors
- 👤 David R. Fagerburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:20
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A polyester having an inherent viscosity of at least 0.6, a flexural modulus of about 30,000 psi or less and a melting point of at least 140° C., the polyester being comprised of A. a dicarboxylic acid component which is 1. from 90 to 70 mole percent 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 80 percent, and 2. from 10 to 30 mole percent dimer acid, and B. 1,4-cyclohexanedimethanol having a trans isomer content of at least 60 percent.
Claim 2
Dependent Claim
82 words
A polyester having an inherent viscosity of at least 0.6, a flexural modulus of about 30,000 psi or less and a melting point of at least 140° C., the polyester being comprised of A. a dicarboxylic acid component which is 1. from 90 to 70 mole percent 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 80 percent, and 2. from 10 to 30 mole percent dimer acid, and B. 1,4-cyclohexanedimethanol having a trans isomer content of at least 60 percent.
Claim 3
Dependent Claim
60 words
A polyester having a inherent viscosity of at least 0.7, a flexural modulus of about 30,000 psi or less and a melting point of at least 140° C., the polyester consisting essentially of A. a dicarboxylic acid component which is 1. from 85 to 75 mole percent 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 90 percent, and
Claim 4
Dependent Claim
60 words
A polyester having a inherent viscosity of at least 0.7, a flexural modulus of about 30,000 psi or less and a melting point of at least 140° C., the polyester consisting essentially of A. a dicarboxylic acid component which is 1. from 85 to 75 mole percent 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 90 percent, and
Claim 5
Dependent Claim
22 words
from 15 to b 25 mole percent dimer acid, and B. 1,4-cyclohexanedimethanol having a trans isomer content of at least 60 percent.
Claim 6
Dependent Claim
22 words
from 15 to b 25 mole percent dimer acid, and B. 1,4-cyclohexanedimethanol having a trans isomer content of at least 60 percent.
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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |