US3717625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dyestuffs containing a complete radical of a styryl dyestuff
Assignee: Novartis AG
•
Filing: 1970-07-21
•
Granted: 1973-02-20
•
Expires: 1990-07-21
Abstract
Abstract Azo dyestuff of the formula WHEREIN D is a diazo component, B a coupling component, A a paraphenylene and R1 and R2 are alkyl that may be substituted. The dyestuffs dye synthetic fibers in bright colors.
Inventors
- 👤 R Peter
- 👤 H Angliker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:04
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09B; C09B23/00; C09B23/14; C09B23/143; C09B56/00; C09B56/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
5 words
A dyestuff of the formula
Claim 2
Dependent Claim
5 words
A dyestuff of the formula
Claim 3
Dependent Claim
9 words
The compound of claim 1 wherein n is zero.
Claim 4
Dependent Claim
11 words
An azo dyestuff as claimed in claim 1 of the formula
Claim 5
Dependent Claim
11 words
An azo dyestuff as claimed in claim 3 of the formula
Claim 6
Dependent Claim
11 words
An azo dyestuff as claimed in claim 1 of the formula
Claim 7
Dependent Claim
9 words
A dyestuff according to claim 1 of the formula
Claim 8
Dependent Claim
9 words
A dyestuff according to claim 1 of the formula
References Cited (Backward Citations)
US2824096A
Cited
US3069408A
Cited
US3097198A
Cited
US3190861A
Cited
US3337522A
Cited
US3518244A
Cited
US3542758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |