US2591470A
Expired / Lapsed
US
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Azo dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1948-10-21
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Granted: 1952-04-01
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Expires: 1968-10-21
Abstract
No abstract record available.
Inventors
- 👤 Schmid Max
- 👤 Danuser Jakob
- 👤 Johner Hans
- 👤 Moser Eduard
- 👤 Wuergler Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:37
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/153; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
THE AZO-DYESTUFF OF 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) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |