US2671776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trisazo-dyestuffs
Assignee: CIBA LIMTIED
•
Filing: 1951-12-10
•
Granted: 1954-03-09
•
Expires: 1971-12-10
Abstract
No abstract record available.
Inventors
- 👤 Gunst Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:46
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/38; C09B35/44; C09B35/46; C09B35/463
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A TRISAZO DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
A TRISAZO DYESTUFF 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) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |