US2617797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1950-05-08
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Granted: 1952-11-11
•
Expires: 1970-05-08
Abstract
No abstract record available.
Inventors
- 👤 Anderau Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:13
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/12; C09B43/136; C09B43/14; C09B43/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
AN AZO DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US1982977A
Cited
US2364355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |