US3877957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment composition
Assignee: Novartis Corp
•
Filing: 1973-08-06
•
Granted: 1975-04-15
•
Expires: 1993-08-06
Abstract
Abstract Pigment compositions consisting of a first pigment and a second pigment, both being preferably azo pigments, are useful for the manufacture of paints and printing inks of enhanced properties.
Inventors
- 👤 Gordon Frank Bradley
- 👤 David Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:13
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0033; C09B67/0046; C09B67/0001; C09B67/0004; C09B67/0008
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A PIGMENT COMPOSITION COMPRISING OF FIRST PIGMENT SELECTED FROM THE GROUP CONSISTING OF ARLAMIDE, DIARYLAMIDE AND NAPHTHOL AZO PIGMENTS HAVING PRECIPITATED ON THE SURFACE THEREOF A SECOND PIGMENT WHICH DIFFERS FROM THE FIRST PIGMENT AND IS ALSO SELECTED FROM THE GROUP CONSISTING OF ARYLAMIDE, DIARYLAMIDE AND NAPHTHOLAZO PIGMENTS, SAID SECOND PIGMENT BEING PRESENT IN AN AMOUNT RANGING FROM 95:5 TO 5:95 PARTS BY WEIGHT OF SAID FIRST PIGMENT.
Claim 2
Dependent Claim
68 words
A PIGMENT COMPOSITION COMPRISING OF FIRST PIGMENT SELECTED FROM THE GROUP CONSISTING OF ARLAMIDE, DIARYLAMIDE AND NAPHTHOL AZO PIGMENTS HAVING PRECIPITATED ON THE SURFACE THEREOF A SECOND PIGMENT WHICH DIFFERS FROM THE FIRST PIGMENT AND IS ALSO SELECTED FROM THE GROUP CONSISTING OF ARYLAMIDE, DIARYLAMIDE AND NAPHTHOLAZO PIGMENTS, SAID SECOND PIGMENT BEING PRESENT IN AN AMOUNT RANGING FROM 95:5 TO 5:95 PARTS BY WEIGHT OF SAID FIRST PIGMENT.
Claim 3
Dependent Claim
20 words
A pigment composition according to claim 1 wherein the first and/or second pigment is an arylamide pigment having the formula
Claim 4
Dependent Claim
20 words
A pigment composition according to claim 1, wherein the first and/or second pigment is a diarylide pigment having the formula
Claim 5
Dependent Claim
20 words
A pigment composition according to claim 1, wherein the first and/or second pigment is a diarylide pigment having the formula
Claim 6
Dependent Claim
20 words
A pigment composition according to claim 1, wherein the first and/or second pigment is a diarylide pigment having the formula
Claim 7
Dependent Claim
81 words
A process for the preparation of a pigment composition according to claim 1 which comprises a. preparing a slurry of a first azo pigment in an aqueous medium; b. preparing in the slurry from step (a) a second different azo pigment from a common or different diazo or tetrazo and a common or different coupling component so that said second azo pigment is precipitated in the presence of said first azo pigment; and c. isolating the pigment composition of step (b).
Claim 8
Dependent Claim
27 words
A process for the preparation of a pigment composition according to claim 6 wherein the product of step (b) is heated prior to isolation of step (c).
References Cited (Backward Citations)
US3661611A
Cited
US3446641A
Cited
US3522520A
Cited
US3725101A
Cited
US3776749A
Cited
US3759733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |