US3102879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cationic dyestuffs
Assignee: BASF SE
•
Filing: 1959-06-22
•
Granted: 1963-09-03
•
Expires: 1979-06-22
Abstract
No abstract record available.
Inventors
- 👤 Baumann Hans
- 👤 Dehnert Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:31
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/12; C09B31/14; C09B43/00; C09B43/06; C09B43/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PROCESS FOR THE PRODUCTION OF A CATIONIC DYESTUSS WHICH COMPRISES REACTING A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
17 words
A PROCESS FOR THE PRODUCTION OF A CATIONIC DYESTUSS WHICH COMPRISES REACTING A COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
CA556218A
Cited
US2883373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |