US2933489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heavy metal-containing dyestuffs
Assignee: —
•
Filing: —
•
Granted: 1960-04-19
•
Expires: 1977-04-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:57
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A COMPLEX CHROMIUM COMPOUND CORRESPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
9 words
A COMPLEX CHROMIUM COMPOUND CORRESPONDING TO THE GENERAL FORMULA
References Cited (Backward Citations)
US2775581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |