Patent EP1813254A2 successfully refreshed from Google Patents.
US2883374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal containing monoazo dyestuffs
Assignee: Bayer AG
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Filing: 1956-07-31
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Granted: 1959-04-21
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Expires: 1976-07-31
Abstract
No abstract record available.
Inventors
- 👤 Enders Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:27
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METAL COMPLEX COMPOUND SELECTED FROM THE GROUP CONSISTING OF COBALT COMPLEXES AND CHROMIUM COMPLEXES, ONE MOL OF SAID METAL BEING BOUND IN COMPLEX UNION WITH 2 MOLES OF DYESTUFFS CORRESPONDING TO THE FORMULA: WHEREIN X MEANS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND CHLORINE, R STANDS FOR A SULFONAMIDE RADICAL, AND R1 MEANS A MEMBER SELECTED FROM THE GROUP CONSISTING OF A -CH2-CH2-CH2- RADICAL LINKED TO THE 8-POSITION AND A LOWER ALKYL, BENZYL AND PHENYL RADICAL, THE DYESTUFF BEING FREE OF SULFONIC AND CARBOXYLIC ACID GROUPS.
Claim 2
Dependent Claim
90 words
A METAL COMPLEX COMPOUND SELECTED FROM THE GROUP CONSISTING OF COBALT COMPLEXES AND CHROMIUM COMPLEXES, ONE MOL OF SAID METAL BEING BOUND IN COMPLEX UNION WITH 2 MOLES OF DYESTUFFS CORRESPONDING TO THE FORMULA: WHEREIN X MEANS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND CHLORINE, R STANDS FOR A SULFONAMIDE RADICAL, AND R1 MEANS A MEMBER SELECTED FROM THE GROUP CONSISTING OF A -CH2-CH2-CH2- RADICAL LINKED TO THE 8-POSITION AND A LOWER ALKYL, BENZYL AND PHENYL RADICAL, THE DYESTUFF BEING FREE OF SULFONIC AND CARBOXYLIC ACID GROUPS.
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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |