US4002607A
Expired / Lapsed
US
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Azo dyes having an amino group para to the azo linkage
Assignee: Honeywell International Inc
•
Filing: 1974-10-25
•
Granted: 1977-01-11
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Expires: 1994-10-25
Abstract
Abstract Bright, bluish-red monoazo dyes having the formula ##STR1## wherein X is Cl, Br or CN, and M is an alkali metal or hydrogen.
Inventors
- 👤 John H. McLeod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:46
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/0003; C09B29/0007; C09B29/24; C09B29/28; C09B29/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
A monoazo dyestuff having the formula ##STR6## wherein X is Cl, Br or CN and M is an alkali metal or hydrogen.
Claim 2
Dependent Claim
22 words
A monoazo dyestuff having the formula ##STR6## wherein X is Cl, Br or CN and M is an alkali metal or hydrogen.
Claim 3
Dependent Claim
9 words
The dyestuff of claim 1 wherein X is Cl.
Claim 4
Dependent Claim
13 words
The dyestuff of claim 1 wherein X is Cl and M is sodium.
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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |