US3037964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear copolyesters of terephthalic and chloroterephthalic acids
Assignee: Olin Corp
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Filing: 1958-05-21
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Granted: 1962-06-05
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Expires: 1978-05-21
Abstract
No abstract record available.
Inventors
- 👤 Herman A Bruson
- 👤 Charles D Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:06
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A RANDOM LINEAR CPOLYESTER CHARCTERIZED BY AN INTRINSIC VISCOSITY GREATER THAN ABOUT 0.40 AND RESULTING FROM HEATING AT 175*-280*C. IN THE PRESENCE OF A SMALL PROPORTION OF ESTERIFICATION AND POLYMERIZATION CATALYST A MIXTURE OF MONOMERIC RAEACTANTS CONSISTING ESSENTIALLY OF ETHYLENE GLCOL AND A MIXTURE OF 50% TO 95% BY WEIGHT OF A LOWER ALKYL DIESTER OF TEREPHTHALIC ACID AND 5% TO 50% BY WEIGH OF A LOWER ALKYL DIESTER OF CHLOROTEREPHTHALIC ACID CONTAINING ONE TO TWO NUCLEAR CHLORINE ATOMS, SAID PERCENTAGES BY WEIGHT BEING BASED ON THE TOTAL WEIGHT OF THE MIXTURE OF SAID LOWER ALKYL DIESTERS.
Claim 2
Dependent Claim
97 words
A RANDOM LINEAR CPOLYESTER CHARCTERIZED BY AN INTRINSIC VISCOSITY GREATER THAN ABOUT 0.40 AND RESULTING FROM HEATING AT 175*-280*C. IN THE PRESENCE OF A SMALL PROPORTION OF ESTERIFICATION AND POLYMERIZATION CATALYST A MIXTURE OF MONOMERIC RAEACTANTS CONSISTING ESSENTIALLY OF ETHYLENE GLCOL AND A MIXTURE OF 50% TO 95% BY WEIGHT OF A LOWER ALKYL DIESTER OF TEREPHTHALIC ACID AND 5% TO 50% BY WEIGH OF A LOWER ALKYL DIESTER OF CHLOROTEREPHTHALIC ACID CONTAINING ONE TO TWO NUCLEAR CHLORINE ATOMS, SAID PERCENTAGES BY WEIGHT BEING BASED ON THE TOTAL WEIGHT OF THE MIXTURE OF SAID LOWER ALKYL DIESTERS.
References Cited (Backward Citations)
US2551732A
Cited
GB728550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-04 | 1965-12-04 | 1966-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-04 | 1969-12-04 | 1970-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-04 | 1973-12-04 | 1974-06-05 | $7700.00 | Window Closed / Lapsed |