Patent US4628093A successfully refreshed from Google Patents.
US4628093A
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Red nickel azine pigment
Assignee: Bayer AG
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Filing: 1984-10-23
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Granted: 1986-12-09
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Expires: 2004-10-23
Abstract
Abstract Red pigment of the formula ##STR1## a process for its preparation and its use.
Inventors
- 👤 Rutger Neeff
- 👤 Meinhard Rolf
- 👤 Walter Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:31
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0025; C09B57/00; C09B57/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
Red pigment which, in one of its tautomeric forms, corresponds to the formula ##STR6##
Claim 2
Dependent Claim
14 words
Red pigment which, in one of its tautomeric forms, corresponds to the formula ##STR6##
Claim 3
Dependent Claim
26 words
Red pigment according to claim 1, characterised by interplanar spacings d/Å of 13.46; 12.75; 3.37 and 19.99 with relative intensities of 100, 90, 90 and 50.
Claim 4
Dependent Claim
27 words
Pigment according to claim 1, characterised by the standard colour values (according to DIN 5033) of X=23.35, Y=14.19 and Z=5.08 and a coloured shade angle of 31.3°.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |