Patent US3230195A successfully refreshed from Google Patents.
US3230195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Onium catalysts for polyester preparation
Assignee: Gevaert Photo Producten NV
•
Filing: 1961-03-14
•
Granted: 1966-01-18
•
Expires: 1981-03-14
Abstract
No abstract record available.
Inventors
- 👤 Andre J Conix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:19
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/24; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/193; C08G63/40; C08G63/52; C08G63/54; C08G63/547; C08G63/66; C08G63/668; C08G63/672; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; C08G63/688; C08G63/6884; C08G63/6886; C08G63/78; C08G63/82; C08G63/87
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR PREPARING HIGH MOLECULAR WEIGHT LINEAR THERMOPLASTIC POLYESTERS COMPRISING, REACTING AN ALKALI METAL DIPHENATE OF A DIPHENOL IN AQUEOUS SOLUTION WITH AT LEAST ONE ORGANIC DICARBOXYLIC ACID HALIDE, DISSOLVED IN A HALOGENATED HYDROCARBON SOLVENT, WHICH IS A SOLVENT FOR THE POLYESTER TO BE FORMED, IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF QUATERNARY PHOSPHONIUM COMPOUNDS AND QUATERNARY ARSONIUM COMPOUNDS.
Claim 2
Dependent Claim
65 words
A PROCESS FOR PREPARING HIGH MOLECULAR WEIGHT LINEAR THERMOPLASTIC POLYESTERS COMPRISING, REACTING AN ALKALI METAL DIPHENATE OF A DIPHENOL IN AQUEOUS SOLUTION WITH AT LEAST ONE ORGANIC DICARBOXYLIC ACID HALIDE, DISSOLVED IN A HALOGENATED HYDROCARBON SOLVENT, WHICH IS A SOLVENT FOR THE POLYESTER TO BE FORMED, IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF QUATERNARY PHOSPHONIUM COMPOUNDS AND QUATERNARY ARSONIUM COMPOUNDS.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |