US3396149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of mixed polyesters from the diglycol esters of aromatic dicarboxylic acids and phosphoric acid
Assignee: Glanzstoff AG
•
Filing: 1963-03-08
•
Granted: 1968-08-06
•
Expires: 1983-03-08
Abstract
No abstract record available.
Inventors
- 👤 Roedel Hilmar
- 👤 Siggel Erhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:06
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/692; C08G63/6924; C08G63/78; C08G63/82; C08G63/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR THE PRODUCTION OF A MIXED POLYMERIC POLYESTER WHICH COMPRISES POLYCONDENSING MONOMERS CONSISTING ESSENTIALLY OF (A) THE BIS-GLYCOL ESTER OF AN AROMATIC DICARBOXYLIC ACID IN ADMIXTURE WITH (B) AT LEAST 2 UP TO ABOUT 15% BY WEIGHT OF PHOSPHORIC ACID WITH REFERENCE TO SAID BIS-GLYCOL ESTER, THE GLYCOL COMPONENT OF SAID ESTER BEING SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC GLYCOLS OF 2 TO 8 CARBON ATOMS IN A SATURATED LINEAR HYDROCARBON STRUCTURE BETWEEN TWO FUNCTIONAL HYDROXY GROUPS AND THE DICARBOXYLIC ACID COMPONENT OF SAID ESTER CONTAINING ITS TWO CARBOXYLIC ACID GROUPS SUBSTITUTED ON AN AROMATIC NUCLEUS AND SEPARATED FROM EACH OTHER BY A HYDROCARBON CHAIN OF AT LEAST 4 CARBON ATOMS.
Claim 2
Dependent Claim
116 words
A PROCESS FOR THE PRODUCTION OF A MIXED POLYMERIC POLYESTER WHICH COMPRISES POLYCONDENSING MONOMERS CONSISTING ESSENTIALLY OF (A) THE BIS-GLYCOL ESTER OF AN AROMATIC DICARBOXYLIC ACID IN ADMIXTURE WITH (B) AT LEAST 2 UP TO ABOUT 15% BY WEIGHT OF PHOSPHORIC ACID WITH REFERENCE TO SAID BIS-GLYCOL ESTER, THE GLYCOL COMPONENT OF SAID ESTER BEING SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC GLYCOLS OF 2 TO 8 CARBON ATOMS IN A SATURATED LINEAR HYDROCARBON STRUCTURE BETWEEN TWO FUNCTIONAL HYDROXY GROUPS AND THE DICARBOXYLIC ACID COMPONENT OF SAID ESTER CONTAINING ITS TWO CARBOXYLIC ACID GROUPS SUBSTITUTED ON AN AROMATIC NUCLEUS AND SEPARATED FROM EACH OTHER BY A HYDROCARBON CHAIN OF AT LEAST 4 CARBON ATOMS.
References Cited (Backward Citations)
CA567821A
Cited
US2197855A
Cited
US2479951A
Cited
DE874210C
Cited
GB769220A
Cited
US3028366A
Cited
US3134744A
Cited
US3070578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |