US2768159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo dyestuffs
Assignee: Novartis AG
•
Filing: 1953-10-05
•
Granted: 1956-10-23
•
Expires: 1973-10-05
Abstract
No abstract record available.
Inventors
- 👤 Bossard Werner
- 👤 Bitterlin Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
C; C09; C09B; C09B29/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A MONOAZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA WHEREIN X REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF H, CL, CH3, OCH3 AND SO3H, Y REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF H AND CH3, EACH OF M, N2 AND N3 REPRESENTS ONE OF THE NUMERALS 0 AND 1, A REPRESENTS A RADICAL SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
62 words
A MONOAZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA WHEREIN X REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF H, CL, CH3, OCH3 AND SO3H, Y REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF H AND CH3, EACH OF M, N2 AND N3 REPRESENTS ONE OF THE NUMERALS 0 AND 1, A REPRESENTS A RADICAL SELECTED FROM THE GROUP CONSISTING OF
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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |