US2855394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallisable monoazo dyestuffs and complex heavy metal compounds thereof
Assignee: Novartis AG
•
Filing: 1956-02-08
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Granted: 1958-10-07
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Expires: 1976-02-08
Abstract
No abstract record available.
Inventors
- 👤 Ackermann Hans
- 👤 Schetty Guido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:22
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A DYESTUFF SELECTED FROM THE CLASS CONSISTING OF THE MONOAZO DYESTUFF HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
15 words
A DYESTUFF SELECTED FROM THE CLASS CONSISTING OF THE MONOAZO DYESTUFF HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2673199A
Cited
US2229200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |