Patent US707921A successfully refreshed from Google Patents.
US3828035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of oxazine dyes with arylamino groups
Assignee: BASF SE
•
Filing: 1972-02-01
•
Granted: 1974-08-06
•
Expires: 1992-02-01
Abstract
Abstract PHENYLAMINO-SUBSTITUTED OXAZINE DYES WHICH ARE EMINENTLY SUITABLE FOR DYEING ANIONICALLY MODIFIED FIBERS BRILLIANT BLUE SHADES OF VERY GOOD FASTNESS PROPERTIES.
Inventors
- 👤 H Baumann
- 👤 U Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:58
CPC Classifications
C; C09; C09B; C09B19/00; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924; Y10S8/927
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |