US2906746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliferous azo dyestuffs
Assignee: —
•
Filing: —
•
Granted: 1959-09-29
•
Expires: 1976-09-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:52
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A COMPLEX CHROMIUM COMPOUND WHICH CONTAINS ONE ATOM OF CHROMIUM BOUND IN COMPLEX UNION WITH ONE MOLECULE EACH OF TWO DIFFERENT ORTHO:ORTHO''-DIHYDROXY MONOAZO DYESTUFFS FREE FROM CARBOXYLIC ACID GROUPS OF WHICH ONE CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
36 words
A COMPLEX CHROMIUM COMPOUND WHICH CONTAINS ONE ATOM OF CHROMIUM BOUND IN COMPLEX UNION WITH ONE MOLECULE EACH OF TWO DIFFERENT ORTHO:ORTHO''-DIHYDROXY MONOAZO DYESTUFFS FREE FROM CARBOXYLIC ACID GROUPS OF WHICH ONE CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
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Cited
US2610175A
Cited
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Cited
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Cited
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Cited
US2806760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |