US2951842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitary diazine and triazine dyestuffs having two different anthraquinone substituents on the azine ring
Assignee: BASF SE
•
Filing: 1957-09-17
•
Granted: 1960-09-06
•
Expires: 1977-09-17
Abstract
No abstract record available.
Inventors
- 👤 Ebel Friedrich
- 👤 Weidinger Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:53
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/46; C09B1/467; C09B69/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
14 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
Claim 3
Dependent Claim
8 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
Claim 4
Dependent Claim
8 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
GB449477A
Cited
US2731464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |