US3128267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo dyestuffs and their metal complex compounds
Assignee: Bayer AG
•
Filing: 1960-03-22
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Granted: 1964-04-07
•
Expires: 1980-03-22
Abstract
No abstract record available.
Inventors
- 👤 Schmitz Peter
- 👤 Morschel Heinrich
- 👤 Wedemeyer Karlfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:42
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/08; C09B33/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A METAL COMPLEX COMPOUND SELECTED FROM THE GROUP CONSISTING OF A CHROMIUM, COBALT AND COPPER COMPLEX OF A DISAZO DYESTUFF WHICH IN THE FREE ACID STATE CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
30 words
A METAL COMPLEX COMPOUND SELECTED FROM THE GROUP CONSISTING OF A CHROMIUM, COBALT AND COPPER COMPLEX OF A DISAZO DYESTUFF WHICH IN THE FREE ACID STATE CORRESPONDS TO THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |