Patent US4970248A successfully refreshed from Google Patents.
US4970248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma modification of an azine pigment
Assignee: Novartis Corp
•
Filing: 1989-05-22
•
Granted: 1990-11-13
•
Expires: 2009-05-22
Abstract
Abstract Azine pigment which has one of the possible tautomeric forms of the formula I ##STR1## and which is present in its c-crystalline modification, which is characterized by the interplanar spacings (relative intensity) 3.29 (100); 3.60 (24); 3.73 (28); 4.64 (28); 6.23 (31); 6.97 (23); 8.05 (67); 9.36 (34); 12.63 (67); 13.96 (32) and 16.35 (30). This pigment is excellently suitable for coloring high-molecular weight organic material, in particular automobile paints.
Inventors
- 👤 Martin Tanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:59
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/04; C09B67/00; C09B67/0025
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
56 words
An azine pigment which has one of the possible tautomeric forms of the formula I ##STR4## and which is present in its γ-crystalline modifications which is characterized by the interplanar spacings (relative intensity) 3.29 (100); 3.60 (24); 3.73 (28); 4.64 (28); 6.23 (31); 6.97 (23); 8.05 (67); 9.36 (34); 12.63 (67); 13.96 (32) and 16.35 (30).
Claim 2
Dependent Claim
56 words
An azine pigment which has one of the possible tautomeric forms of the formula I ##STR4## and which is present in its γ-crystalline modifications which is characterized by the interplanar spacings (relative intensity) 3.29 (100); 3.60 (24); 3.73 (28); 4.64 (28); 6.23 (31); 6.97 (23); 8.05 (67); 9.36 (34); 12.63 (67); 13.96 (32) and 16.35 (30).
Claim 3
Dependent Claim
32 words
A process for the preparation of the azine pigment of formula I in its γ-modification, according to claim 1, by kneading with salt or dry grinding with salt the o-modification without heating.
Claim 4
Dependent Claim
58 words
The process according to claim 2, which is carried out by kneading with salt in the presence of an organic solvent and using 100 to 150 parts by weight of a salt selected from NaCl, CaCl 2 , Na 2 SO 4 or Al 2 (SO 4 ) 3 to 10 to 50 parts by weight of pigment.
Claim 5
Dependent Claim
24 words
A pigmented, high-molecular weight organic material containing, as the pigment, an azine pigment of the formula I in its y-modification according to claim 1.
References Cited (Backward Citations)
US2053095A
Cited
US3346551A
Cited
US3547929A
Cited
US3928315A
Cited
EP0074924A1
Cited
US4628093A
Cited
US4614547A
Cited
US4721745A
Cited
US4722737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |