US3284473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-amino-4-hydroxy-2-phenoxy-anthraquinones
Assignee: BASF Schweiz AG
•
Filing: 1963-04-24
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Granted: 1966-11-08
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Expires: 1983-04-24
Abstract
No abstract record available.
Inventors
- 👤 Ramanathan Visvanathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:50
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/54; C09B1/547; C09B1/503; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 0
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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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |