US2515546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copperable disazo dyestuffs
Assignee: Novartis AG
•
Filing: 1948-04-27
•
Granted: 1950-07-18
•
Expires: 1968-04-27
Abstract
No abstract record available.
Inventors
- 👤 Bossard Werner
- 👤 Reding Marcel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:20
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/153
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
8 words
A COPPERABLE DISAZO DYESTUFF CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
US1505568A
Cited
US1879223A
Cited
US1984096A
Cited
US2120814A
Cited
US2241796A
Cited
US2310181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |