US2711404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brown chrome containing dyestuffs
Assignee: Novartis AG
•
Filing: 1951-12-26
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Granted: 1955-06-21
•
Expires: 1971-12-26
Abstract
No abstract record available.
Inventors
- 👤 Schetty Guido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:34
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
COMPLEX CHROMIUM COMPOUND OF THE GENERAL FORMULA I-CR-II, WHEREIN I AND II ARE CO-ORDINATED MONOAZO DYESTUFFS FREE FROM CARBOXYLIC AND SULPHONIC ACID GROUPS OF THE FORMULAE:
Claim 2
Dependent Claim
26 words
COMPLEX CHROMIUM COMPOUND OF THE GENERAL FORMULA I-CR-II, WHEREIN I AND II ARE CO-ORDINATED MONOAZO DYESTUFFS FREE FROM CARBOXYLIC AND SULPHONIC ACID GROUPS OF THE FORMULAE:
References Cited (Backward Citations)
US2104357A
Cited
US2551056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-20 | 1958-12-20 | 1959-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-20 | 1962-12-20 | 1963-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-20 | 1966-12-20 | 1967-06-21 | $7700.00 | Window Closed / Lapsed |