US2804454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Complex heavy metal compounds of monoazo dyestuffs
Assignee: Novartis AG
•
Filing: 1955-07-11
•
Granted: 1957-08-27
•
Expires: 1975-07-11
Abstract
No abstract record available.
Inventors
- 👤 Beffa Fabio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:18
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A METALLIFEROUS COMPOUND WHICH CONTAINS ONE ATOM OF A METAL SELECTED FROM THE GROUP CONSISTING OF COBALT AND CHROMIUM IN COMPLEX UNION WITH ONE MOLECULE OF AN O.O''-DIHYDROXYMONOAZO DYESTUFF WHICH IS FREE FROM SULPHONIC ACID AND CARBOXYLIC ACID GROUPS AND WHICH CORRESPONDS TO THE FORMULA:
Claim 2
Dependent Claim
45 words
A METALLIFEROUS COMPOUND WHICH CONTAINS ONE ATOM OF A METAL SELECTED FROM THE GROUP CONSISTING OF COBALT AND CHROMIUM IN COMPLEX UNION WITH ONE MOLECULE OF AN O.O''-DIHYDROXYMONOAZO DYESTUFF WHICH IS FREE FROM SULPHONIC ACID AND CARBOXYLIC ACID GROUPS AND WHICH CORRESPONDS TO THE FORMULA:
References Cited (Backward Citations)
US1835821A
Cited
US2276174A
Cited
US2351936A
Cited
US2367073A
Cited
US2551056A
Cited
US2610175A
Cited
FR1110460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |