US2739146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo-dyestuffs insoluble in water
Assignee: Hoechst AG
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Filing: 1953-12-04
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Granted: 1956-03-20
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Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Weigele Reinhold
- 👤 Huss Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:13
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/08; C09B35/10; C09B35/105; D; D21; D21H; D21H21/00; D21H21/14; D21H21/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
THE WATER-INSOLUBLE DISAZO-DYESTUFFS CORRESPONDING TO THE GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
THE WATER-INSOLUBLE DISAZO-DYESTUFFS CORRESPONDING TO THE GENERAL 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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |