US2653926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliferous monoazo dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1951-10-15
•
Granted: 1953-09-29
•
Expires: 1971-10-15
Abstract
No abstract record available.
Inventors
- 👤 Zickendraht Christian
- 👤 Wittwer Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:55
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A COMPLEX METAL COMPOUND WHICH CONTAINS ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF COBALT AND COPPER IN COMPLEX COMBINATION WITH A MONOAZO DYESTUFF CONTAINING TWO SULFONIC ACID GROUPS AND CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
36 words
A COMPLEX METAL COMPOUND WHICH CONTAINS ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF COBALT AND COPPER IN COMPLEX COMBINATION WITH A MONOAZO DYESTUFF CONTAINING TWO SULFONIC ACID GROUPS AND CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
US1216813A
Cited
US1959507A
Cited
US2165034A
Cited
US2421315A
Cited
US2443226A
Cited
US2512251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |