US2832764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of azo dyestuffs
Assignee: BASF SE
•
Filing: 1956-03-20
•
Granted: 1958-04-29
•
Expires: 1976-03-20
Abstract
No abstract record available.
Inventors
- 👤 Huenig Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:02
CPC Classifications
C; C09; C09B; C09B27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
AN IMPROVED PROCESS FOR THE PRODUCTION OF AN AZO DYESTUFF OF THE GENERAL FORMULA
Claim 2
Dependent Claim
14 words
AN IMPROVED PROCESS FOR THE PRODUCTION OF AN AZO DYESTUFF 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) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |