Patent US3708499A successfully refreshed from Google Patents.
US3708499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rhodamine dyes which are sparingly soluble or insoluble in water
Assignee: BASF SE
•
Filing: 1970-11-20
•
Granted: 1973-01-02
•
Expires: 1990-11-20
Abstract
Abstract RHODAMINE DYES HAVING ANIONS WHICH RENDER THEM INSOLUBLE IN WATER AND WHICH MAKE THEM ESPECIALLY USEFUL IN PRINTING INKS, BALL PEN INKS OR, FOR EXAMPLS, TRANSPARENT SURFACE COATINGS.
Inventors
- 👤 F Andree
- 👤 H Burkhardt
- 👤 G Riedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:19
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/10; C09B11/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |