US2879265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo dyestuffs and their metal complex compounds
Assignee: Sandoz AG
•
Filing: 1957-12-12
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Granted: 1959-03-24
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Expires: 1977-12-12
Abstract
No abstract record available.
Inventors
- 👤 Steinemann Willy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:31
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/28; C09B43/00; C09B43/12; C09B43/136; C09B43/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE DISAZO DYESTUFFS WHICH IN THE METAL-FREE STATE CORRESPOND TO THE FORMULA
Claim 2
Dependent Claim
20 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE DISAZO DYESTUFFS WHICH IN THE METAL-FREE STATE CORRESPOND 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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |