Patent US2549922A successfully refreshed from Google Patents.
US2549922A
Expired / Lapsed
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Metalizable monoazo dyestuffs and a process for their manufacture
Assignee: Sandoz AG
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Filing: 1948-01-26
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Granted: 1951-04-24
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Expires: 1968-01-26
Abstract
No abstract record available.
Inventors
- 👤 Neier Reinhard
- 👤 Wehrli Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:07
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
26 words
A PROCESS FOR THE MANUFACTURE OF A METALLIZABLE MONOAZO DYESTUFF, COMPRISING THE STEPS OF TREATING THE COPPER COMPLEX COMPOUND OF THE MONOAZO DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US1067881A
Cited
US1880432A
Cited
GB410192A
Cited
US2008602A
Cited
US2353675A
Cited
US2495244A
Cited
US2437868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |