US2518078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazodyestuffs of the pyrazolone series free from sulfonic acid groups and a process of making same
Assignee: Novartis AG
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Filing: 1947-01-27
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Granted: 1950-08-08
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Expires: 1967-01-27
Abstract
No abstract record available.
Inventors
- 👤 Schmid Otto
- 👤 Buchs Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:35
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3647; C09B29/3652; C09B29/366; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19121
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
23 words
THE YELLOW MONOAZO DYESTUFFS OF THE PYRAZOLONE SERIES, FREE FROM SULFONIC ACID GROUPS, HYDROXY GROUPS AND CARBOXYLIC ACID GROUPS, OF 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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |