US2673199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliferous azo dyestuffs
Assignee: —
•
Filing: —
•
Granted: 1954-03-23
•
Expires: 1971-03-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:54
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/48; C09B45/482
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
THE COMPLEX CHROMIUM COMPOUND WHICH CONTAINS ONE ATOM OF CHROMIUM BOUND IN COMPLEX UNION TO ONE MOLECULE OF EACH OF THE TWO DYESTUFFS OF THE FORMULAE
Claim 2
Dependent Claim
26 words
THE COMPLEX CHROMIUM COMPOUND WHICH CONTAINS ONE ATOM OF CHROMIUM BOUND IN COMPLEX UNION TO ONE MOLECULE OF EACH OF THE TWO DYESTUFFS OF THE FORMULAE
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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |