Patent US2563091A successfully refreshed from Google Patents.
US2563091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyes
Assignee: Celanese Corp
•
Filing: 1942-06-25
•
Granted: 1951-08-07
•
Expires: 1962-06-25
Abstract
No abstract record available.
Inventors
- 👤 Wright John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:15
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/06; C09B31/062; C09B43/00; C09B43/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
THE DISAZO DYE OF THE FORMULA:
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) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |