US2769003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonylation of azo compounds and products
Assignee: EIDP Inc
•
Filing: 1956-02-29
•
Granted: 1956-10-30
•
Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 William W Prichard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:18
CPC Classifications
C; C07; C07D; C07D498/00; C07D498/02; C07D498/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
PROCESS OF CARBONYLATING AROMATIC AZO COMPOUNDS WHICH COMPRISES REACTING AN AROMATIC AZO COMPOUND OF THE FORMULA R-N=N-R'' IN WHICH R AND R'' ARE SELECTED FROM THE GROUP CONSISTING OF PHENYL, HYDROXYPHENYL, ALKOXYPHENPYL, NAPHTHYL, AMINOTOLYL, AMINOPHENYL, HYDROXYNAPHTHYL, ACETAMIDOPHENYL AND HALOPHENYL RADICALS, WITH AT LEAST 2 MOLS OF CARBON MONOXIDE PER MOLE OF SAID AROMATIC AZO COMPOUND IN THE PRESENCE OF AT LEAST CATALYTIC AMOUNTS OF NICKEL TETRACARBONYL.
Claim 2
Dependent Claim
66 words
PROCESS OF CARBONYLATING AROMATIC AZO COMPOUNDS WHICH COMPRISES REACTING AN AROMATIC AZO COMPOUND OF THE FORMULA R-N=N-R'' IN WHICH R AND R'' ARE SELECTED FROM THE GROUP CONSISTING OF PHENYL, HYDROXYPHENYL, ALKOXYPHENPYL, NAPHTHYL, AMINOTOLYL, AMINOPHENYL, HYDROXYNAPHTHYL, ACETAMIDOPHENYL AND HALOPHENYL RADICALS, WITH AT LEAST 2 MOLS OF CARBON MONOXIDE PER MOLE OF SAID AROMATIC AZO COMPOUND IN THE PRESENCE OF AT LEAST CATALYTIC AMOUNTS OF NICKEL TETRACARBONYL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |