US2729630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid disazo dyestuffs
Assignee: BASF SE
•
Filing: 1951-10-10
•
Granted: 1956-01-03
•
Expires: 1971-10-10
Abstract
No abstract record available.
Inventors
- 👤 Krzikalla Hans
- 👤 Eistert Bernd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:41
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/32; D06P3/3206; D06P3/3226; C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AN ACID DISAZO DYESTUFF OF THE GENERAL FORMULA
Claim 2
Dependent Claim
8 words
AN ACID DISAZO 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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |