US2951847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazacyanine dyestuffs cations
Assignee: BASF SE
•
Filing: 1958-09-23
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Granted: 1960-09-06
•
Expires: 1978-09-23
Abstract
No abstract record available.
Inventors
- 👤 Baumann Hans
- 👤 Leuchs Dieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:47
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/16; C09B23/162; C09B23/166; C09B26/00; C09B26/02; C09B26/04; C09B44/00; C09B44/10; C09B44/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
8 words
THE DIAZACYANINE DYESTUFF CATION OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2441612A
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 |