Patent US2774755A successfully refreshed from Google Patents.
US2774755A
Expired / Lapsed
US
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Acid amide derivatives of azo-dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1953-12-14
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Granted: 1956-12-18
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Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Schmid Max
- 👤 Moser Eduard
- 👤 Frey Christoph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:10
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/32; C09B43/38; C09B43/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
AN ACID AMIDE DERIVATIVE OF AN AZO COMPOUND WHICH DERIVATIVE IS FREE UPON GROUPS IMPARTING SOLUBILITY IN WATER AND CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
23 words
AN ACID AMIDE DERIVATIVE OF AN AZO COMPOUND WHICH DERIVATIVE IS FREE UPON GROUPS IMPARTING SOLUBILITY IN WATER AND CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
US1999438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |