US2565898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of metalliferous azo dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1947-09-18
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Granted: 1951-08-28
•
Expires: 1967-09-18
Abstract
No abstract record available.
Inventors
- 👤 Widmer Willi
- 👤 Zickendraht Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:16
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/01
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
22 words
PROCESS FOR THE MANUFACTURE OF A CHROMIFEROUS DYESTUFF BY THE ACTION OF AN AGENT YIELDING CHROMIUM UPON THE MONAZO-DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
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Cited
US2010613A
Cited
US1994116A
Cited
US1979913A
Cited
US1993462A
Cited
US2305747A
Cited
US2417735A
Cited
US2428866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |