Patent US3227682A successfully refreshed from Google Patents.
US3227682A
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US
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Copolyesters of homoterephthalic acid
Assignee: Ethyl Corp
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Filing: 1961-10-19
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Granted: 1966-01-04
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Expires: 1981-10-19
Abstract
No abstract record available.
Inventors
- 👤 Edwin D Hornbaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:26
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199; C08G63/181; C08G63/19; C08G63/193; C08G63/195
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A MOLDABLE COPOLYMER CHARACTERIZED BY HAVING A RELATIVELY HIGH RESISTANCE TO WATER AND HEAT, SAID COPOLYMER BEING COMPOSED OF FROM ABOUT 75 TO ABOUT 85 MOL PERCENT OF A DIOL TEREPHTHALATE AND FROM ABOUT 25 TO ABOUT 15 MOL PERCENT OF A DIOL HOMOTEREPHTHALATE; SAID DIOL BEING SELECTED FROM THE GROUP CONSISTING OF (A) ALIPHATIC GLYCOLS CONTAINING UP TO ABOUT 6 CARON ATOMS AND (B) DIPHENOLS AND OTHER SYMMETRICAL CARBOCYCLIC DIOLS CONTAINING FROM ABOUT 6 TO ABOUT 24 CARBON ATOMS.
Claim 2
Dependent Claim
80 words
A MOLDABLE COPOLYMER CHARACTERIZED BY HAVING A RELATIVELY HIGH RESISTANCE TO WATER AND HEAT, SAID COPOLYMER BEING COMPOSED OF FROM ABOUT 75 TO ABOUT 85 MOL PERCENT OF A DIOL TEREPHTHALATE AND FROM ABOUT 25 TO ABOUT 15 MOL PERCENT OF A DIOL HOMOTEREPHTHALATE; SAID DIOL BEING SELECTED FROM THE GROUP CONSISTING OF (A) ALIPHATIC GLYCOLS CONTAINING UP TO ABOUT 6 CARON ATOMS AND (B) DIPHENOLS AND OTHER SYMMETRICAL CARBOCYCLIC DIOLS CONTAINING FROM ABOUT 6 TO ABOUT 24 CARBON ATOMS.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |