US4071312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Green-yellow to orange monoazo paper dyes
Assignee: EIDP Inc
•
Filing: 1972-10-16
•
Granted: 1978-01-31
•
Expires: 1992-10-16
Abstract
Abstract Fluorescent paper dyes, green-yellow to orange in color, having the formula ##STR1## wherein Y = O or S Z = h or CH 3 n = 0 or 1 and M = h, li, Na, K, NH 4 , or substituted ammonium.
Inventors
- 👤 John Blackwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:13
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3665; C09B29/3669; C09B29/3673; C09B29/0003; C09B29/0011; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/919; Y10S8/937
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
47 words
A green-yellow to orange fluorescent dye of the formula ##STR15## where Y = O or S Z = h or CH 3 n = 0 or 1 and M = h, li, Na, K, NH 4 or the protonated form of a tertiary lower alkylamine or alkanolamine.
Claim 2
Dependent Claim
47 words
A green-yellow to orange fluorescent dye of the formula ##STR15## where Y = O or S Z = h or CH 3 n = 0 or 1 and M = h, li, Na, K, NH 4 or the protonated form of a tertiary lower alkylamine or alkanolamine.
Claim 3
Dependent Claim
26 words
A green-yellow fluorescent dye according to claim 1, said dye having the formula ##STR16## wherein M is selected from Li, Na and protonated tertiary lower alkanolamine.
Claim 4
Dependent Claim
14 words
A green-yellow fluorescent dye according to claim 2, said dye having the formula ##STR17##
Claim 5
Dependent Claim
14 words
A green-yellow fluorescent dye according to claim 2, said dye having the formula ##STR18##
Claim 6
Dependent Claim
14 words
A green-yellow fluorescent dye according to claim 2, said dye having the formula ##STR19##
Claim 7
Dependent Claim
25 words
A fluorescent dye according to claim 1, said dye having the formula ##STR20## wherein M is selected from Li, Na and protonated tertiary lower alkanolamine.
Claim 8
Dependent Claim
14 words
A yellow fluorescent dye according to claim 6, said dye having the formula ##STR21##
Claim 9
Dependent Claim
17 words
A dyestuff as claimed in claim 1 which in its free-acid form has the structural formula: ##STR22##
Claim 10
Dependent Claim
9 words
Paper dyed with a dye according to claim 1.
Claim 11
Dependent Claim
20 words
The paper as claimed in claim 9 wherein the dye in its free-acid form has the structural formula ##STR23## ##STR24##
References Cited (Backward Citations)
US3071428A
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US2140538A
Cited
US2686178A
Cited
US3101988A
Cited
US3426010A
Cited
FR2000639A1
Cited
GB1262302A
Cited
GB1262303A
Cited
GB1262301A
Cited
US3726851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |