US3349104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-acyloxyphenyl-4, 8-diamino-1, 5-dihydroxy-anthraquinones
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1963-08-05
•
Granted: 1967-10-24
•
Expires: 1983-08-05
Abstract
No abstract record available.
Inventors
- 👤 Lodge Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:11
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/51; C09B1/516; C09B1/503; C09B1/515; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
WATER-INSOLUBLE DYESTUFFS OF THE FORMULA:
Claim 2
Dependent Claim
5 words
WATER-INSOLUBLE DYESTUFFS OF THE FORMULA:
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |