Patent US3718187A successfully refreshed from Google Patents.
Patent US4003882A successfully refreshed from Google Patents.
US4003882A
Expired / Lapsed
US
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Polyesterether having commercially acceptable mold release characteristics
Assignee: Eastman Kodak Co
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Filing: 1975-10-28
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Granted: 1977-01-18
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Expires: 1995-10-28
Abstract
Abstract Disclosed is a polyesterether having a critical range of poly(alkylene oxide) glycol. Articles molded from this polyesterether exhibit unobvious mold release characteristics.
Inventors
- 👤 David R. Fagerburg
- 👤 Burns Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:58
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A composition comprising a polyesterether having an inherent viscosity of at least 0.4 comprised of A. a dicarboxylic acid component comprised of terephthalic acid, and B. a diol component comprised of 1. a glycol comprised of 95-75 mole percent 1,4-cyclohexanedimethanol and 5-25 mole percent ethylene glycol, and 2. 20-45 weight percent, based on the weight of the polyesterether, of a poly(alkylene oxide) glycol having 2 to 4 carbon atoms in the repeating unit and having a molecular weight in the range of 400 to 2,000.
Claim 2
Dependent Claim
85 words
A composition comprising a polyesterether having an inherent viscosity of at least 0.4 comprised of A. a dicarboxylic acid component comprised of terephthalic acid, and B. a diol component comprised of 1. a glycol comprised of 95-75 mole percent 1,4-cyclohexanedimethanol and 5-25 mole percent ethylene glycol, and 2. 20-45 weight percent, based on the weight of the polyesterether, of a poly(alkylene oxide) glycol having 2 to 4 carbon atoms in the repeating unit and having a molecular weight in the range of 400 to 2,000.
Claim 3
Dependent Claim
72 words
A composition comprising a polyesterether having an inherent viscosity of at least 0.4 comprised of A. a dicarboxylic acid component comprised of terephthalic acid, B. a diol component comprised of 1. a glycol comprised of 90-85 mole percent 1,4-cyclohexanedimethanol and 10-15 mole percent ethylene glycol, and 2. 25-40 weight percent, based on the weight of the polyesterether, of poly(tetramethylene oxide) glycol having a molecular weight in the range of 400 to 2,000.
Claim 4
Dependent Claim
72 words
A composition comprising a polyesterether having an inherent viscosity of at least 0.4 comprised of A. a dicarboxylic acid component comprised of terephthalic acid, B. a diol component comprised of 1. a glycol comprised of 90-85 mole percent 1,4-cyclohexanedimethanol and 10-15 mole percent ethylene glycol, and 2. 25-40 weight percent, based on the weight of the polyesterether, of poly(tetramethylene oxide) glycol having a molecular weight in the range of 400 to 2,000.
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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |