US3445454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mono azo dyestuffs
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1965-07-23
•
Granted: 1969-05-20
•
Expires: 1985-07-23
Abstract
No abstract record available.
Inventors
- 👤 Brian Ribbons Fishwick
- 👤 Andrew Tze-Chiu Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:00
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; C09B29/0805; C09B29/0807; C09B29/0809; C09B29/0811; C09B29/0813
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2266142A
Cited
US2359305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |