US4014866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barium laked phenylazonaphthalene dye containing sulfonic acid groups
Assignee: BASF SE
•
Filing: 1975-05-29
•
Granted: 1977-03-29
•
Expires: 1995-05-29
Abstract
Abstract Azo dyes containing sulfonic acid groups laked with barium and derived from an anilinesulfonic acid as diazo component and a beta -naphtholsulfonic acid as coupling component for example a dye of the formula <IMAGE>
Inventors
- 👤 Georg Henning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:01
CPC Classifications
C; C09; C09B; C09B63/00; C09B63/005; B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
The pigment of the formula: ##STR6##
Claim 2
Dependent Claim
6 words
The pigment of the formula: ##STR6##
References Cited (Backward Citations)
US333042A
Cited
US765079A
Cited
US787768A
Cited
US830312A
Cited
US789096A
Cited
US1878698A
Cited
US2117859A
Cited
US2948715A
Cited
US3578652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |