US3216995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of cationic dyestuffs
Assignee: BASF SE
•
Filing: 1962-10-01
•
Granted: 1965-11-09
•
Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Baumann Hans
- 👤 Dehnert Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:33
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PROCESS FOR THE PRODUCTION OF A CATIONIC DYESTUFF WHICH COMPRISES REACTING A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
17 words
A PROCESS FOR THE PRODUCTION OF A CATIONIC DYESTUFF WHICH COMPRISES REACTING A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |