Patent US3890346A successfully refreshed from Google Patents.
US3890346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of N-arylphthalimidines
Assignee: Monsanto Co
•
Filing: 1973-03-12
•
Granted: 1975-06-17
•
Expires: 1993-03-12
Abstract
Abstract WITH AN AROMATIC NITRO COMPOUND OF FORMULA UNDER CARBON MONOXIDE PRESSURE IN PRESENCE OF A BASIC TERTIARY AMINE OR AMIDE AND A CATALYTIC AMOUNT OF A CARBONYL COMPOUND OF A METAL OF GROUP VIII. D R A W I N G N-Arylphthalimidines of formula WHERE R and R'' are hydrogen atoms, halogen atoms or organic groups such as occurring in ortho-phthalaldehydes and n and m are integers of from 1 to 3, are produced by heating an orthophthalaldehyde of formula
Inventors
- 👤 Abul Fateh Mohammed Iobal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:06
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/46
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
10 words
A PROCESS FOR THE PREPARATION OF N-ARYLPHTHALIMIDINE OF THE FORMULA
Claim 2
Dependent Claim
10 words
A PROCESS FOR THE PREPARATION OF N-ARYLPHTHALIMIDINE OF THE FORMULA
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein the catalyst is hexarhodiumhexadecarcarbonyl.
References Cited (Backward Citations)
US3390149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |