US3257378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indazolium azo dyestuffs
Assignee: Kuhlmann SA
•
Filing: 1963-02-12
•
Granted: 1966-06-21
•
Expires: 1983-02-12
Abstract
No abstract record available.
Inventors
- 👤 Sureau Robert Frederic Michel
- 👤 Mingasson Georges Raymon Henry
- 👤 Kremer Gilbert Victor Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:49
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/0025
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1211449A
Cited
US2795575A
Cited
US2913303A
Cited
US2893816A
Cited
US3121710A
Cited
US3161631A
Cited
US3148180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |