US2773871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyestuffs of the anthraquinone series
Assignee: BASF Schweiz AG
•
Filing: 1954-08-13
•
Granted: 1956-12-11
•
Expires: 1974-08-13
Abstract
No abstract record available.
Inventors
- 👤 Brassel Jakob
- 👤 Fasciati Alfred
- 👤 Buehler Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:52
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
AN ANTHRAQUINONE DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
AN ANTHRAQUINONE DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
CH97360A
Cited
US2235480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |