US3399191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzindole cyanotrimethine basic dyestuffs
Assignee: Bayer AG
•
Filing: 1964-06-23
•
Granted: 1968-08-27
•
Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Brack Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:15
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/06; C09B23/00; C09B23/0008; C09B23/005; C09B23/0058; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917; Y10S8/92; Y10S8/921; Y10S8/927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |