US2980666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dyestuffs of low solubility in water
Assignee: Sandoz AG
•
Filing: 1958-06-09
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Granted: 1961-04-18
•
Expires: 1978-06-09
Abstract
No abstract record available.
Inventors
- 👤 Merian Ernest
- 👤 Bruno J R Nicolaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:49
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/06; C07; C07D; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/82; C09B29/00; C09B29/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A AZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
8 words
A AZO DYESTUFF WHICH CORRESPONDS TO THE 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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |