US3133052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternated disazo dyestuffs
Assignee: Sandoz AG
•
Filing: 1959-12-08
•
Granted: 1964-05-12
•
Expires: 1979-12-08
Abstract
No abstract record available.
Inventors
- 👤 Merian Ernest
- 👤 Bruno J R Nicolaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:15
CPC Classifications
C; C09; C09B; C09B44/00; C09B44/10; C09B31/00; C09B31/02; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
QUATERNATED DISAZO DYES OF THE FORMULA
Claim 2
Dependent Claim
6 words
QUATERNATED DISAZO DYES OF THE FORMULA
References Cited (Backward Citations)
US2216446A
Cited
US2359862A
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US2771466A
Cited
US2864812A
Cited
US2852504A
Cited
US2913303A
Cited
US2893816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |