US2954371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water insoluble disazo-dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1959-01-02
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Granted: 1960-09-27
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Expires: 1979-01-02
Abstract
No abstract record available.
Inventors
- 👤 Liechti Hans Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:18
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/06; C09B31/062
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A DISAZO-DYESTUFF WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
7 words
A DISAZO-DYESTUFF WHICH CORRESPONDS 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) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |