Patent US2881335A successfully refreshed from Google Patents.
Patent US4055559A successfully refreshed from Google Patents.
US4055559A
Expired / Lapsed
US
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Disazo pigment containing at least 2 chlorine atoms and process for their manufacture
Assignee: Novartis Corp
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Filing: 1975-10-08
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Granted: 1977-10-25
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Expires: 1995-10-08
Abstract
Abstract A disazo pigment of the formula ##STR1## WHEREIN X and Y are hydrogen, chlorine, alkyl of 1 - 4 C-atoms or one of X and Y can be alkoxy of 1 - 4 C-atoms and Z is chlorine or methyl, which is useful for pigmenting high molecular organic material and shows excellent fastness to light and weather.
Inventors
- 👤 Georg Cseh
- 👤 Willy Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:59
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/153
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
A disazo pigment of the formula ##STR8##wherein X and Y are hydrogen, chlorine or methyl and one of X and Y may be methoxy.
Claim 2
Dependent Claim
24 words
A disazo pigment of the formula ##STR8##wherein X and Y are hydrogen, chlorine or methyl and one of X and Y may be methoxy.
Claim 3
Dependent Claim
11 words
A disazo pigment according to claim 1 of the formula ##STR9##
Claim 4
Dependent Claim
11 words
A disazo pigment according to claim 1 of the formula ##STR10##
Claim 5
Dependent Claim
10 words
A disazo pigment according to claim 1 of the formula
References Cited (Backward Citations)
US1505568A
Cited
US1762022A
Cited
US2591470A
Cited
US3413279A
Cited
US3513154A
Cited
DE2244035A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |