US2417735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of chroming dyestuffs with ortho hydroxy carboxylic acid chromium complexes
Assignee: Novartis AG
•
Filing: 1942-07-31
•
Granted: 1947-03-18
•
Expires: 1962-07-31
Abstract
No abstract record available.
Inventors
- 👤 Conzetti Achille
- 👤 Schmid Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:52
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/01
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2054489A
Cited
FR758264A
Cited
GB418622A
Cited
US1989569A
Cited
FR782389A
Cited
US2090432A
Cited
US2180776A
Cited
US2193228A
Cited
US2243020A
Cited
US2230686A
Cited
US2305747A
Cited
US2317671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-17 | 1950-09-16 | 1951-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-17 | 1954-09-16 | 1955-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-17 | 1958-09-16 | 1959-03-18 | $7700.00 | Window Closed / Lapsed |