US3040019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-complex dyestuffs
Assignee: —
•
Filing: —
•
Granted: 1962-06-19
•
Expires: 1979-06-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:19
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/22; C09B45/18; C09B45/24; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A MIXED DYESTUFF CONSISTING ESSENTIALLY OF COMPLEX METAL COMPOUNDS OF AZO DYESTUFFS FREE FROM SULFONIC ACID GROUPS, WHICH CONTAIN MOLECULES OF TWO DIFFERENT MONOAZO DYESTUFFS BOUND IN COMPLEX UNION WITH ATOMS OF A METAL SELECTD FROM THE GROUP CONSISTING OF CHROMIUM AND COBALT, IN A 2:1 RELATIONSHIP, AND IN WHICH ONE OF THE TWO MONOAZO DYESTUFFS CORRESPONDS IN THE METAL-FREE FORM TO 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) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |