US3923889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alcohol-soluble ethyl auramine salts
Assignee: BASF SE
•
Filing: 1973-01-08
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Granted: 1975-12-02
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Expires: 1993-01-08
Abstract
Abstract Ethyl auramine salts, in particular ethyl auramine thiocyanate, having high solubility in alcohols and water containing alcohols. The salts are very suitable for use in flexographic inks.
Inventors
- 👤 Karl Schmeidl
- 👤 Manfred Eisert
- 👤 Guenther Riefel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:40
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/02; C09B67/00; C09B67/0071; C09B67/0075; C09B69/00; C09B69/02; C09B69/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
THE DYE OF THE FORMULA:
Claim 2
Dependent Claim
5 words
THE DYE OF THE FORMULA:
References Cited (Backward Citations)
US3132178A
Cited
US3314994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |