Patent US1303577A successfully refreshed from Google Patents.
Patent US3793349A successfully refreshed from Google Patents.
US3793349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quinizarin-4-aminophenoxy acetamides
Assignee: GAF Corp
•
Filing: 1972-06-01
•
Granted: 1974-02-19
•
Expires: 1992-06-01
Abstract
Abstract BLUE COLOR DYES PARTICULARLY USEFUL FOR DYEING POLYESTER FIBERS COMPRISING QUINIZARINE-4-AMINOPHENOXY ACETAMIDES, METHODS OF PREPARING AND USING THE SAME.
Inventors
- 👤 G Johnson
- 👤 J Shown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:04
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/51; C09B1/514; C09B62/00; C09B62/44; C09B62/78; C09B62/80
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |