US2985646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium-containing dyestuffs
Assignee: Novartis AG
•
Filing: 1958-03-10
•
Granted: 1961-05-23
•
Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Schetty Guido
- 👤 Biedermann Walter
- 👤 Beffa Fabio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:56
CPC Classifications
C; C09; C09B; C09B55/00; C09B55/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE COMPLEX CHROMIUM COMPOUND CORRESPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
9 words
THE COMPLEX CHROMIUM COMPOUND CORRESPONDING TO THE GENERAL FORMULA
References Cited (Backward Citations)
US2817575A
Cited
US2685595A
Cited
US2806760A
Cited
GB775385A
Cited
US2855393A
Cited
US2813853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |