US2606185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo-dyestuffs of the pyrazolone series
Assignee: BASF Schweiz AG
•
Filing: 1949-02-02
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Granted: 1952-08-05
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Expires: 1969-02-02
Abstract
No abstract record available.
Inventors
- 👤 Widmer Willy
- 👤 Fasciati Alfred
- 👤 Reich Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:50
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/24; C09B29/28; C09B29/30; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A MONOAZO-DYESTUFF OF THE PYRAZOLONE SERIES, WHICH IS FREE FROM SULFONIC ACID GROUPS, CONTAINS A SINGLE CARBOXYL GROUP AND CORRESPONDS TO THE GENERAL FORMULA
Claim 2
Dependent Claim
24 words
A MONOAZO-DYESTUFF OF THE PYRAZOLONE SERIES, WHICH IS FREE FROM SULFONIC ACID GROUPS, CONTAINS A SINGLE CARBOXYL GROUP AND CORRESPONDS TO THE GENERAL 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) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |