Patent US3496162A successfully refreshed from Google Patents.
US3496162A
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US
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Disazo dyestuffs containing n-(cyanoethyl)-sulphonamide groups having low solubility in water
Assignee: Sandoz AG
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Filing: 1966-12-09
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Granted: 1970-02-17
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Expires: 1986-12-09
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang Groebke
- 👤 Curt Mueller
- 👤 Roswitha Wirz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:43
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/06; C09B31/062; C09B29/00; C09B29/0025; C09B29/06; C09B29/08; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3153642A
Cited
FR1409796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |