US3440240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactive azo-dyestuffs
Assignee: Hoechst AG
•
Filing: 1964-06-09
•
Granted: 1969-04-22
•
Expires: 1984-06-09
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Kuhne
- 👤 Fritz Meininger
- 👤 Heinrich Frolich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:50
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/006; C09B62/44; C09B62/4401; C09B62/4403; C09B62/523; C09B62/527; D; D06; D06P; D06P1/00; D06P1/38; D06P1/384; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |