US2848446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dyestuffs
Assignee: Saul and Co
•
Filing: 1955-01-20
•
Granted: 1958-08-19
•
Expires: 1975-01-20
Abstract
No abstract record available.
Inventors
- 👤 Maderni Piero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:26
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN AZO DYESTUFF AND ITS CHROMIUM COMPLEX COMPOUND WHICH, IN THE METAL-FREE STATE, CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
25 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN AZO DYESTUFF AND ITS CHROMIUM COMPLEX COMPOUND WHICH, IN THE METAL-FREE STATE, CORRESPONDS 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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |