US4020068A
Expired / Lapsed
US
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Chromogenic furoquinoxalines
Assignee: WTA Inc
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Filing: 1975-02-28
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Granted: 1977-04-26
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Expires: 1995-02-28
Abstract
Abstract A chromogenic compound of normally colorless form is disclosed having the following structural formula: ##STR1## wherein X and Y can be ##STR2## and R can be hydrogen, chlorine, nitro, phenyl, benzyl, alkyl, alkoxy, and dialkylamino. The compound is eligible for use in pressure-sensitive record material and mark-forming manifold systems.
Inventors
- 👤 Sheldon Farber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:09
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/145; C; C07; C07D; C07D241/00; C07D241/36; C07D241/38; C07D241/40; C07D241/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
A chromogenic compound represented by the formula: ##STR3## wherein X is one of K, L, M, T, W and Z and Y is one of K, L, M and T; and ##STR4## R 1 , R 2 , R 3 , R 4 and R 7 are hydrogen, chlorine, nitro, alkyl, alkoxy, and dialkylamino, wherein alkyl and alkoxy are less than seven carbon atoms; R 5 and R 6 hydrogen, phenyl, benzyl, and alkyl, wherein alkyl is less than seven carbon atoms and, additionally, when one of R 5 and R 6 is phenyl, alkyl and alkoxy wherein alkyl and alkoxy are less than seven carbon atoms; R 9 is hydrogen, phenyl and alkyl wherein alkyl is less than seven carbon atoms; R 10 is hydrogen, alkyl and alkoxy wherein alkyl and alkoxy are less than seven carbon atoms; R 11 is alkoxy less than seven carbon atoms; R 12 is hydrogen, methyl and ethyl.
Claim 2
Dependent Claim
155 words
A chromogenic compound represented by the formula: ##STR3## wherein X is one of K, L, M, T, W and Z and Y is one of K, L, M and T; and ##STR4## R 1 , R 2 , R 3 , R 4 and R 7 are hydrogen, chlorine, nitro, alkyl, alkoxy, and dialkylamino, wherein alkyl and alkoxy are less than seven carbon atoms; R 5 and R 6 hydrogen, phenyl, benzyl, and alkyl, wherein alkyl is less than seven carbon atoms and, additionally, when one of R 5 and R 6 is phenyl, alkyl and alkoxy wherein alkyl and alkoxy are less than seven carbon atoms; R 9 is hydrogen, phenyl and alkyl wherein alkyl is less than seven carbon atoms; R 10 is hydrogen, alkyl and alkoxy wherein alkyl and alkoxy are less than seven carbon atoms; R 11 is alkoxy less than seven carbon atoms; R 12 is hydrogen, methyl and ethyl.
Claim 3
Dependent Claim
10 words
The chromogenic compound of claim 1 wherein Y is K.
Claim 4
Dependent Claim
10 words
The chromogenic compound of claim 2 wherein X is K.
Claim 5
Dependent Claim
21 words
The chromogenic compound of claim 1 wherein Y is M and X is one of L, M, T, W and Z.
Claim 6
Dependent Claim
10 words
The chromogenic compound of claim 4 wherein X is M.
Claim 7
Dependent Claim
12 words
The chromogenic compound of claim 1 wherein X and Y are L.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |