US2936306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo-dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1958-05-08
•
Granted: 1960-05-10
•
Expires: 1978-05-08
Abstract
No abstract record available.
Inventors
- 👤 Schmid Max
- 👤 Mueller Willy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:09
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/153
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
AN AZO-DYESTUFF WHICH IS FREE FROM GROUPS IMPARTING SOLUBILITY IN WATER AND CORRESPOND TO THE FORMULA
Claim 2
Dependent Claim
16 words
AN AZO-DYESTUFF WHICH IS FREE FROM GROUPS IMPARTING SOLUBILITY IN WATER AND 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) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |