US2943084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New chromiferous monoazo-dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1958-08-11
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Granted: 1960-06-28
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Expires: 1978-08-11
Abstract
No abstract record available.
Inventors
- 👤 Buehler Arthur
- 👤 Fasciati Alfred
- 👤 Riat Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:42
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/08; C09B62/095
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A COMPLEX CHROMIUM COMPOUND CONTAINING ONE ATOM OF CHROMIUM BOUND IN COMPLEX UNION WITH TWO MOLECULES OF DIFFERENT MONOAZO DYESTUFFS OF WHICH ONE CORRESPONDS TO THE FORMULA HO-R-N=N-R1 WHEREIN R REPRESENTS A NAPHTHALENE RADICAL BOUND TO THE AZO LINKAGE IN VICINAL POSITION TO THE HYDROXYL GROUP, AND R1 REPRESENTS A 2-HYDROXYNAPHTHALENE RADICAL BOUND TO THE AZO LINKAGE IN POSITION 1 AND THE OTHER IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF DYESTUFFS CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
77 words
A COMPLEX CHROMIUM COMPOUND CONTAINING ONE ATOM OF CHROMIUM BOUND IN COMPLEX UNION WITH TWO MOLECULES OF DIFFERENT MONOAZO DYESTUFFS OF WHICH ONE CORRESPONDS TO THE FORMULA HO-R-N=N-R1 WHEREIN R REPRESENTS A NAPHTHALENE RADICAL BOUND TO THE AZO LINKAGE IN VICINAL POSITION TO THE HYDROXYL GROUP, AND R1 REPRESENTS A 2-HYDROXYNAPHTHALENE RADICAL BOUND TO THE AZO LINKAGE IN POSITION 1 AND THE OTHER IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF DYESTUFFS CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
US1779298A
Cited
US2012779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |