US4017486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic alpha-cyano-p-dimethylaminocinnamoyl dyes and paper dyed therewith
Assignee: BASF Corp
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Filing: 1976-05-18
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Granted: 1977-04-12
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Expires: 1996-05-18
Abstract
Abstract Cationic dyes for paper having the formula: ##STR1## wherein R is selected from hydrogen and methyl, X is selected from 0 and NH, n is 2 or 3, and Y - is an anion selected from halide and methosulfate, have improved storage stability in aqueous acid solutions.
Inventors
- 👤 Bennett George Buell
- 👤 Frank Fred Loffelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:30
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B23/143; C09B57/00; D; D21; D21H; D21H21/00; D21H21/14; D21H21/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
37 words
A cationic dye having the formula: ##STR6##wherein R is selected from hydrogen and methyl, X is selected from O and NH, n is 2 or 3 and Y - is an anion selected from halide and methosulfate.
Claim 2
Dependent Claim
37 words
A cationic dye having the formula: ##STR6##wherein R is selected from hydrogen and methyl, X is selected from O and NH, n is 2 or 3 and Y - is an anion selected from halide and methosulfate.
Claim 3
Dependent Claim
10 words
A dye according to claim 1 wherein X is O.
Claim 4
Dependent Claim
10 words
A dye according to claim 1 having the formula: ##STR7##
Claim 5
Dependent Claim
8 words
Paper dyed with the dye of claim 3.
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |