Patent US3971805A successfully refreshed from Google Patents.
US3971805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iminoisoindolinone pigments and process for their manufacture
Assignee: Novartis Corp
•
Filing: 1975-04-17
•
Granted: 1976-07-27
•
Expires: 1995-04-17
Abstract
Abstract Iminoisoindolinone pigments of the formula ##SPC1## Wherein the X denote chlorine or bromine atoms are useful for coloring plastics and lacquers in fast yellow shades.
Inventors
- 👤 Ernst Model
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:09
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/04; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
15 words
An iminoisoindolinone pigment of the formula ##SPC6## wherein the X denote chlorine or bromine atoms.
Claim 2
Dependent Claim
15 words
An iminoisoindolinone pigment of the formula ##SPC6## wherein the X denote chlorine or bromine atoms.
Claim 3
Dependent Claim
11 words
The compound as claimed in claim 1 of the formula ##SPC7##
References Cited (Backward Citations)
US2973358A
Cited
US3867404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |