Patent US5441608A successfully refreshed from Google Patents.
Patent US3396172A successfully refreshed from Google Patents.
US3396172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone dyes containing pyromellitamide groups
Assignee: BASF SE
•
Filing: 1965-12-28
•
Granted: 1968-08-06
•
Expires: 1985-12-28
Abstract
No abstract record available.
Inventors
- 👤 Braun Willy
- 👤 Schefczik Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:37
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/42; C09B1/206; C09B1/40; C09B3/00; C09B3/02; C09B3/06; C09B3/10; C09B5/00; C09B5/02; C09B5/16; C09B69/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2741621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |