US2875192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo-dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1957-10-25
•
Granted: 1959-02-24
•
Expires: 1977-10-25
Abstract
No abstract record available.
Inventors
- 👤 Gunst Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:15
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
WATER-SOLUBLE AZO-DYESTUFFS OF THE FORMULA
Claim 2
Dependent Claim
5 words
WATER-SOLUBLE AZO-DYESTUFFS OF THE FORMULA
References Cited (Backward Citations)
US1867451A
Cited
US2795576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |