US3332931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dyes of the perylenetetracarboxylic imide series
Assignee: BASF SE
•
Filing: 1964-05-08
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Granted: 1967-07-25
•
Expires: 1984-05-08
Abstract
No abstract record available.
Inventors
- 👤 Braun Willy
- 👤 Anton Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:32
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN THE PROCESS FOR THE PRODUCTION OF A PERYLENETETRACARBOXYLIC IMIDE BY CONDENSING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PERYLENE-3,4,9,10-TETRACARBOXYLIC ACID AND PERYLENETETRACARBOXYLIC ANHYDRIDE WITH A PRIMARY AROMATIC AMINE AT A TEMPERATURE OF ABOUT 150* C. TO 330*C. IN THE PRESENCE OF A HIGH BOILING INERT ORGANIC SOLVENT AS THE CONDENSATION REACTION MEDIUM, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE CONDENSATION REACTION IN THE PRESENCE OF THE METAL SALT OF AN ORGANIC ACID WHEREIN THE METAL IS SELECTED FROM THE CLASS CONSISTING OF ZINC AND CADMIUM AND THE ORGANIC ACID IS SELECTED FROM THE CLASS CONSISTING OF FORMIC ACID, ACETIC ACID, PROPIONIC ACID, BUTYRIC ACID, STEARIC ACID, BENZOIC ACID, PHTHALIC ACID, HEXAHYDROBENZOIC ACID, PHENYLACETIC ACID AND NICOTINIC ACID.
Claim 2
Dependent Claim
119 words
IN THE PROCESS FOR THE PRODUCTION OF A PERYLENETETRACARBOXYLIC IMIDE BY CONDENSING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PERYLENE-3,4,9,10-TETRACARBOXYLIC ACID AND PERYLENETETRACARBOXYLIC ANHYDRIDE WITH A PRIMARY AROMATIC AMINE AT A TEMPERATURE OF ABOUT 150* C. TO 330*C. IN THE PRESENCE OF A HIGH BOILING INERT ORGANIC SOLVENT AS THE CONDENSATION REACTION MEDIUM, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE CONDENSATION REACTION IN THE PRESENCE OF THE METAL SALT OF AN ORGANIC ACID WHEREIN THE METAL IS SELECTED FROM THE CLASS CONSISTING OF ZINC AND CADMIUM AND THE ORGANIC ACID IS SELECTED FROM THE CLASS CONSISTING OF FORMIC ACID, ACETIC ACID, PROPIONIC ACID, BUTYRIC ACID, STEARIC ACID, BENZOIC ACID, PHTHALIC ACID, HEXAHYDROBENZOIC ACID, PHENYLACETIC ACID AND NICOTINIC ACID.
References Cited (Backward Citations)
US2715127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |