US2920070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallisable azo dyestuffs and metalliferous complexes derived therefrom
Assignee: Compagnie Francaise des Matieres Colorantes SARL
•
Filing: 1957-12-13
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Granted: 1960-01-05
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Expires: 1977-12-13
Abstract
No abstract record available.
Inventors
- 👤 Jirou Marcel
- 👤 Frey Jean-Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:18
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/12; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
MONOAZO DYESTUFFS OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
6 words
MONOAZO DYESTUFFS OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2371178A
Cited
US2816101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |