US3137686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble benzimidazolone monoazo-dyestuffs
Assignee: Hoechst AG
•
Filing: 1963-04-02
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Granted: 1964-06-16
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Expires: 1983-04-02
Abstract
No abstract record available.
Inventors
- 👤 Dietz Erich
- 👤 Forderreuther Manfred
- 👤 Schilling Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:23
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/10; C09B29/18; C09B29/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
THE WATER-INSOLUBLE MONOAZO-DYESTUFFS HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
THE WATER-INSOLUBLE MONOAZO-DYESTUFFS HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |