US2991280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallisable monoazo dyestuffs and the complex heavy metal compounds thereof
Assignee: Novartis AG
•
Filing: 1956-06-25
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Granted: 1961-07-04
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Expires: 1976-06-25
Abstract
No abstract record available.
Inventors
- 👤 Schetty Guido
- 👤 Beffa Fabio
- 👤 Kuster Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:50
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
THE COMPLEX CHROMIUM COMPOUND WHICH CONTAINS ONE ATOM OF CHROMIUM BOUND IN COMPLEX UNION TO TWO MOLECULES OF A DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
23 words
THE COMPLEX CHROMIUM COMPOUND WHICH CONTAINS ONE ATOM OF CHROMIUM BOUND IN COMPLEX UNION TO TWO MOLECULES OF A DYESTUFF OF THE FORMULA
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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |