US3221003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chrgmium cqmplex mixed azo dyestuffs
Assignee: —
•
Filing: —
•
Granted: 1965-11-30
•
Expires: 1982-11-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:44
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
AN ASYMMETRICAL CHROMIUM MIXED COMPLEX AZO DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
10 words
AN ASYMMETRICAL CHROMIUM MIXED COMPLEX AZO DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
US2230686A
Cited
US2352701A
Cited
US2767166A
Cited
US3005813A
Cited
US2891939A
Cited
US3062806A
Cited
US3132130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |