US3288755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of copolyetheresters
Assignee: Inventa AG fuer Forschung und Patentverwertung
•
Filing: 1964-02-19
•
Granted: 1966-11-29
•
Expires: 1984-02-19
Abstract
No abstract record available.
Inventors
- 👤 Griehl Wolfgang
- 👤 Luckert Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:01
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS FOR THE PRODUCTION OF COPOLYETHERESTERS OF HIGH TENSILE STRENGTH, ELASTICITY AND DYEABILITY, SUITABLE 3FOR FABRICATION INTO FIBERS, WHICH COMPRISES SUBJECTING TO AN ESTER INTERCHANGE AND SIMULTANEOUS ESTERIFICATION AND COPOLYMERIZATION A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF P-OXYBENZOIC AND VANILLIC ACIDS, OXYALKYL CARBOXYLIC ACID ESTERS OF SAID ACIDS AND MIXTURES THEROF, IN MIXTURE WITH ETHYLENE GLYCOL, WITH COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF TEREPHTHALIC ACID AND ITS DIMETHYL ESTER; TOGETHER WITH A CATALYST PROMOTING ESTER INTERCHANGE SELECTED FROM THE GROUP CONSISTING OF AL, ZN, PB, SN, BI, CO, GE, TI, ZR, CD, MN, AND SB IN THE FORM OF METALS, OXIDES AND CARBONATES; WHILE SIMULTANEOUSLY FORMING THE GLYCOL ETHER OF SAID ACIDS; CONDENSING THE REACTION MIXTURE THUS OBTAINED IN A SINGLE STAGE REACTION AND THEREBY SIMULTANEOUSLY PRODUCING THE COPOLYETHERESTER.
Claim 2
Dependent Claim
132 words
A PROCESS FOR THE PRODUCTION OF COPOLYETHERESTERS OF HIGH TENSILE STRENGTH, ELASTICITY AND DYEABILITY, SUITABLE 3FOR FABRICATION INTO FIBERS, WHICH COMPRISES SUBJECTING TO AN ESTER INTERCHANGE AND SIMULTANEOUS ESTERIFICATION AND COPOLYMERIZATION A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF P-OXYBENZOIC AND VANILLIC ACIDS, OXYALKYL CARBOXYLIC ACID ESTERS OF SAID ACIDS AND MIXTURES THEROF, IN MIXTURE WITH ETHYLENE GLYCOL, WITH COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF TEREPHTHALIC ACID AND ITS DIMETHYL ESTER; TOGETHER WITH A CATALYST PROMOTING ESTER INTERCHANGE SELECTED FROM THE GROUP CONSISTING OF AL, ZN, PB, SN, BI, CO, GE, TI, ZR, CD, MN, AND SB IN THE FORM OF METALS, OXIDES AND CARBONATES; WHILE SIMULTANEOUSLY FORMING THE GLYCOL ETHER OF SAID ACIDS; CONDENSING THE REACTION MIXTURE THUS OBTAINED IN A SINGLE STAGE REACTION AND THEREBY SIMULTANEOUSLY PRODUCING THE COPOLYETHERESTER.
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |