US3709870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo dyestuffs
Assignee: Bayer AG
•
Filing: 1970-06-04
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Granted: 1973-01-09
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Expires: 1990-06-04
Abstract
Abstract DIAZO DYESTUFF CONTAINING 1 SULPHONIC ACID GROUP OF THE GENERAL FORMULA 1-(((R1)M-PHENYL)-N=N-),4-((2-R4,4-(PHENYL-CH2-N(-CH2CH2-SO3H)-),5-R5 -PHENYL)-N=N-),R2,R3-BENZENE WHEREN R1 REPRESENTS HYDROGEN, CHLORINE, BROMINE OR A METHYL, ETHYL OR TRIFLUOROMETHYL GROUP R2 AND R3 DENOTE HYDROGEN OR INDEPENDENTLY OF ONE ANOTHER DENOTE CHLORINE, BROMINE OR A METHYL, ETHYL METHOXY OR ETHOXY GROUP, R4 REPRESENTS HYDROGEN, CHLORINE, BROMINE OR A METHYL ETHYL, METHOXY OR ETHOXY GROUP OR THE RESIDUE NHCOCNH2N+1, WITH N REPRESENTING A NUMBER FROM O TO 4, R5 DENOTED HYDROGEN OR A METHYL, MEHOXY OR ETHOXY GROUP, AND M REPRESENTS AN INTEGER FROM 1 TO 5.
Inventors
- 👤 G Wolfrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:02
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/04; C09B31/043; C09B31/047
Claims Analysis
Total Claims: 0
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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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |