Patent US2756223A successfully refreshed from Google Patents.
US2756223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-containing azo dyestuffs
Assignee: Novartis AG
•
Filing: 1953-03-27
•
Granted: 1956-07-24
•
Expires: 1973-03-27
Abstract
No abstract record available.
Inventors
- 👤 Schetty Guido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:22
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A COMPLEX HEAVY METAL COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
9 words
A COMPLEX HEAVY METAL COMPOUND OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2012779A
Cited
US2151518A
Cited
US2317733A
Cited
US2634263A
Cited
US2610175A
Cited
US2597676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |