US2882266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper containing disazo dyestuffs of the stilbene series
Assignee: Novartis AG
•
Filing: 1956-12-04
•
Granted: 1959-04-14
•
Expires: 1976-12-04
Abstract
No abstract record available.
Inventors
- 👤 Keller Ernst
- 👤 Durig Rudolf
- 👤 Mindermann Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:40
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
THE COMPLEX COPPER, COMPOUND OF A DISAZO DYESTUFF HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
12 words
THE COMPLEX COPPER, COMPOUND OF A DISAZO DYESTUFF HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2175552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |