US2875193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New direct-dyeing azo-dyestuffs and process for their manufacture
Assignee: BASF Schweiz AG
•
Filing: 1957-05-20
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Granted: 1959-02-24
•
Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Riat Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:12
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/12; C09B43/136; C09B43/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A DISAZO DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
A DISAZO DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2384283A
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 |