US4015998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,9-Dichloroquinacridone pigment compositions
Assignee: EIDP Inc
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Filing: 1975-09-24
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Granted: 1977-04-05
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Expires: 1995-09-24
Abstract
Abstract The disclosure teaches the preparation of a unique 2,9-dichloroquinacridone which provides a heat stable, highly dispersible magenta colorant suitable for use in plastics and the like where heat stability and lightfastness are necessary. The disclosure further teaches a pigmentary composition wherein the unique 2,9-dichloroquinacridone is combined with molybdate orange pigment to give a true red pigment of superior intensity, lightfastness and heat stability.
Inventors
- 👤 Edward Ephraim Jaffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0025; C09B67/0027; C09B48/00; C09B67/0033
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
35 words
Pigmentary 2,9-dichloroquinacridone characterized by 20 values of its X-ray powder diffraction pattern having a strong band at 27.8°, medium bands at 5.3°, 15.2° and 23.2° and weak bands at 14.0°, 16.5°, 19.2°, 21.3° and 22.8°.
Claim 2
Dependent Claim
35 words
Pigmentary 2,9-dichloroquinacridone characterized by 20 values of its X-ray powder diffraction pattern having a strong band at 27.8°, medium bands at 5.3°, 15.2° and 23.2° and weak bands at 14.0°, 16.5°, 19.2°, 21.3° and 22.8°.
Claim 3
Dependent Claim
26 words
Pigmentary composition containing from 50 to 3% by weight of the 2,9-dichloroquinacridone of claim 1 in combination with 50 to 97% by weight of molybdate orange.
Claim 4
Dependent Claim
17 words
A pigmentary composition of claim 2 in which the molybdate orange is encapsulated in dense amorphous silica.
Claim 5
Dependent Claim
30 words
A pigmentary composition of claim 2 containing from 25 to 5% by weight of the 2,9-dichloroquinacridone of claim 1 in combination with 75 to 95% by weight of molybdate orange.
Claim 6
Dependent Claim
17 words
A pigmentary composition of claim 4 in which the molybdate orange is encapsulated in dense amorphous silica.
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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |