US3346541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing linear fiber and film forming polyesters by polycondensation in the presence of a titanium alkoxide catalyst and a germanium compound
Assignee: Imperial Chemical Industries Ltd
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Filing: 1966-03-10
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Granted: 1967-10-10
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Expires: 1986-03-10
Abstract
No abstract record available.
Inventors
- 👤 Davies Trevor
- 👤 Fletcher Norman
- 👤 Mcintyre James Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:55
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR THE MANUFACTURE OF LINEAR FIBER AND FILM-FORMING POLYESTERS WHICH COMPRISES REACTING AND POLYCONDENSING ETHYLENE GLYCOL WITH AN ESTER-FORMING DERIVATIVE OF TEREPHTHALIC ACID, IN THE PRESENCE, AT LEAST DURING THE POLYCONDENSATION STEP, OF ABOUT 0.02% OF A TITANIUM ALKOXIDE, TOGETHER WITH ABOUT 0.035% OF A MEMBER OF THE GROUP CONSISTING OF GERMANIUM ALKOXIDE, GERMANIUM DIOXIDE AND GERMANIUM TETRACHLORIDE, THE PERCENTAGES BASED UPPON THE WEIGHT OF THE ESTER-FORMING DERIVATIVE OF TEREPHTHALATE ACID.
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE MANUFACTURE OF LINEAR FIBER AND FILM-FORMING POLYESTERS WHICH COMPRISES REACTING AND POLYCONDENSING ETHYLENE GLYCOL WITH AN ESTER-FORMING DERIVATIVE OF TEREPHTHALIC ACID, IN THE PRESENCE, AT LEAST DURING THE POLYCONDENSATION STEP, OF ABOUT 0.02% OF A TITANIUM ALKOXIDE, TOGETHER WITH ABOUT 0.035% OF A MEMBER OF THE GROUP CONSISTING OF GERMANIUM ALKOXIDE, GERMANIUM DIOXIDE AND GERMANIUM TETRACHLORIDE, THE PERCENTAGES BASED UPPON THE WEIGHT OF THE ESTER-FORMING DERIVATIVE OF TEREPHTHALATE ACID.
References Cited (Backward Citations)
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Cited
US3047515A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |