US2769805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliferous trisazo-dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1953-03-23
•
Granted: 1956-11-06
•
Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Hanhart Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:56
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/16; C09B31/20; C09B45/00; C09B45/02; C09B45/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A METALLIFEROUS TRISAZO DYESTUFF OF THE GENERAL FORMULA
Claim 2
Dependent Claim
8 words
A METALLIFEROUS TRISAZO DYESTUFF OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2427539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |