US3001982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dyestuffs
Assignee: BASF SE
•
Filing: 1955-08-08
•
Granted: 1961-09-26
•
Expires: 1975-08-08
Abstract
No abstract record available.
Inventors
- 👤 Krzikalla Hans
- 👤 Lange Guenter
- 👤 Eistert Bernd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:01
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/10; C09B29/18; C09B29/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN AZO DYESTUFF OF THE GENERAL FORMULA: WHEREIN X REPRESENTS A MEMBER FROM THE GROUP CONSISTING OF CARBOXY, METHOXY AND HYDROXY, Y REPRESENTS A SULFONIC ACID GROUP, Z REPRESENTS A MEMBER FROM THE GROUP CONSISTING OF HYDROGEN, CHLORINE, LOWER ALKYL, LOWER ALKOXY, AND NITRO- GROUPS, AND R IS A HYDROXY LOWER ALKYL GROUP, AND ITS COPPER, CHROMIUM, AND COBALT COMPLEXES.
Claim 2
Dependent Claim
68 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN AZO DYESTUFF OF THE GENERAL FORMULA: WHEREIN X REPRESENTS A MEMBER FROM THE GROUP CONSISTING OF CARBOXY, METHOXY AND HYDROXY, Y REPRESENTS A SULFONIC ACID GROUP, Z REPRESENTS A MEMBER FROM THE GROUP CONSISTING OF HYDROGEN, CHLORINE, LOWER ALKYL, LOWER ALKOXY, AND NITRO- GROUPS, AND R IS A HYDROXY LOWER ALKYL GROUP, AND ITS COPPER, CHROMIUM, AND COBALT COMPLEXES.
References Cited (Backward Citations)
US2112403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |