US3179650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyazo dyes
Assignee: Sandoz AG
•
Filing: 1962-10-04
•
Granted: 1965-04-20
•
Expires: 1982-10-04
Abstract
No abstract record available.
Inventors
- 👤 Wehrli Walter
- 👤 Wicki Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:30
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/18; C09B33/02; C09B33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A POLYAZO DYE OF THE FORMULA
Claim 2
Dependent Claim
6 words
A POLYAZO DYE OF THE FORMULA
References Cited (Backward Citations)
USRE22046E
Cited
US1667327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |