US4051155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone dyes
Assignee: Honeywell International Inc
•
Filing: 1975-12-15
•
Granted: 1977-09-27
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Expires: 1995-12-15
Abstract
Abstract Anthraquinone compounds having the formula: ##STR1## wherein R is alkylene of 1 to 4 carbon atoms, exhibit attractive blue shades and are useful in dyeing textiles.
Inventors
- 👤 Robert C. Hoare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:22
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; C09B1/285
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
A compound having the formula ##STR7## wherein R is alkylene of 1 to 4 carbon atoms.
Claim 2
Dependent Claim
16 words
A compound having the formula ##STR7## wherein R is alkylene of 1 to 4 carbon atoms.
Claim 3
Dependent Claim
6 words
A compound having the formula: ##STR8##
Claim 4
Dependent Claim
6 words
A compound having the formula: ##STR8##
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |