US3763193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone dyestuffs
Assignee: Bayer AG
•
Filing: 1971-02-17
•
Granted: 1973-10-02
•
Expires: 1991-02-17
Abstract
Abstract ANTHRAQUINONE DYESTUFFS USEFUL IN THE DYEING OF CELLULOSE ESTERS, POLYAMIDES, OR POLYESTER FIBRE MATERIALS CONTAINING FROM TWO TO FOUR AUXOCHROMES IN THE ALPHA POSITION AND AN ACYLOXY GROUP IN THE BETA POSITION, SAID ACYLOXY GROUP BEING PREFERABLY A SULPHONOXY GROUP CONTAINING AN ARYL, ALKYL, OR DIALKYLAMINO SUBSTITUENT.
Inventors
- 👤 H Volker
- 👤 G Gunter
- 👤 H Bein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:35
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/08; C09B1/00; C09B1/02; C09B1/06; C09B1/50; C09B1/51; C09B1/56; C09B1/58; D; D06; D06P; D06P1/00; D06P1/0048; D06P3/00; D06P3/34; D06P3/36; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922; Y10S8/924
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |