Patent US3579136A successfully refreshed from Google Patents.
Patent US2993884A successfully refreshed from Google Patents.
US2993884A
Expired / Lapsed
US
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Metal complexes of monoazo-dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1959-01-12
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Granted: 1961-07-25
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Expires: 1979-01-12
Abstract
No abstract record available.
Inventors
- 👤 Ruegg Rudolf
- 👤 Liechti Hans Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:29
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D231/46; C07D231/18; C07D231/20; C07D231/22; C07D231/26; C07D231/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A WATER-SOLUBLE COPPOR COMPLEX, IN WHICH ONE COPPER ATOM IS BOUND IN COMPLEX UNION WITH ONE MOLE OF A MONOAZO-DYESTUFF FREE FROM ACID GROUPS IMPARTING SOLUBILITY IN WATER, OF THE FORMULA
Claim 2
Dependent Claim
31 words
A WATER-SOLUBLE COPPOR COMPLEX, IN WHICH ONE COPPER ATOM IS BOUND IN COMPLEX UNION WITH ONE MOLE OF A MONOAZO-DYESTUFF FREE FROM ACID GROUPS IMPARTING SOLUBILITY IN WATER, OF THE FORMULA
References Cited (Backward Citations)
US2446662A
Cited
US2883374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |