US3074945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New anthraquinone dyestuffs contain-
Assignee: —
•
Filing: —
•
Granted: 1963-01-22
•
Expires: 1980-01-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:23
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/46; C09B1/467
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
AN ANTHRAQUINONE VAT DYESTUFF WHICH IS FREE FROM SALT-FORMING GROUPS IMPARTING SOLUBILITY IN WATER AND WHICH HAS THE FORMULA
Claim 2
Dependent Claim
19 words
AN ANTHRAQUINONE VAT DYESTUFF WHICH IS FREE FROM SALT-FORMING GROUPS IMPARTING SOLUBILITY IN WATER AND WHICH HAS 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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |