US2459941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone vat dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1944-06-02
•
Granted: 1949-01-25
•
Expires: 1964-06-02
Abstract
No abstract record available.
Inventors
- 👤 Holbro Theodor
- 👤 Kern Walter
- 👤 Sutter Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:00
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1903708A
Cited
US1539689A
Cited
US1705023A
Cited
US1877884A
Cited
GB339267A
Cited
US1934771A
Cited
US1938993A
Cited
US2001737A
Cited
US2049189A
Cited
US2001738A
Cited
US2045304A
Cited
US2149433A
Cited
US2233496A
Cited
US2335698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-25 | 1952-07-26 | 1953-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-25 | 1956-07-26 | 1957-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-25 | 1960-07-26 | 1961-01-25 | $7700.00 | Window Closed / Lapsed |