US4104437A
Expired / Lapsed
US
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Pressure-sensitive copy system including ureido fluoran chromogenic compounds
Assignee: Champion International Corp
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Filing: 1975-09-08
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Granted: 1978-08-01
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Expires: 1995-09-08
Abstract
Abstract A chromogenic compound having the structural formula ##STR1## wherein R 1 and R 2 each represent an alkyl group; R 3 and R 4 each represent a hydrogen atom, a halogen atom, an alkyl group, a nitro group, an amino group, an acyl group, or a carboalkoxy group; R 5 represents a hydrogen atom or an alkyl group, with the proviso that R 5 represents an alkyl group only when R 4 represents a hydrogen atom; R 6 represents an alkyl group, an aryl group or an aralkyl group; and X and Y each represent a hydrogen atom, a halogen atom, a nitro group, a lower alkyl group, an aryl group, an alkoxy group or a carboalkoxy group. The aforesaid compound may be provided in a pressure-sensitive copy system wherein a visible image is formed upon reaction of the above chromogenic compound with an electron-accepting material of the Lewis acid type.
Inventors
- 👤 David N. Vincent
- 👤 Cheng-Hsiung Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:05
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/10; B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/145; B41M5/1455; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A pressure-sensitive copy system comprising a substrate bearing pressure-rupturable microcapsules containing a chromogenic compound having the formula ##STR6## wherein R 1 and R 2 each represent an alkyl group; R 3 and R 4 each represent a hydrogen atom; a halogen atom, an alkyl group, a nitro group, an amino group, an acyl group, or a carboalkoxy group; R 5 represents a hydrogen atom or an alkyl group, with the proviso that R 5 represents an alkyl group only when R 4 represents a hydrogen atom; R 6 represents an alkyl group, an aryl group or an aralkyl group; and X and Y each represent a hydrogen atom, a halogen atom, a nitro group, a lower alkyl group, an aryl group, an alkoxy group, or a carboalkoxy group.
Claim 2
Dependent Claim
128 words
A pressure-sensitive copy system comprising a substrate bearing pressure-rupturable microcapsules containing a chromogenic compound having the formula ##STR6## wherein R 1 and R 2 each represent an alkyl group; R 3 and R 4 each represent a hydrogen atom; a halogen atom, an alkyl group, a nitro group, an amino group, an acyl group, or a carboalkoxy group; R 5 represents a hydrogen atom or an alkyl group, with the proviso that R 5 represents an alkyl group only when R 4 represents a hydrogen atom; R 6 represents an alkyl group, an aryl group or an aralkyl group; and X and Y each represent a hydrogen atom, a halogen atom, a nitro group, a lower alkyl group, an aryl group, an alkoxy group, or a carboalkoxy group.
Claim 3
Dependent Claim
104 words
The pressure-sensitive copy system of claim 1 wherein R 1 and R 2 each represent a lower alkyl group having from 1 to 4 carbon atoms; R 3 and R 4 each represent a hydrogen atom, a methyl group or a halogen atom; R 5 represents a hydrogen atom or a lower alkyl group, with the proviso that R 5 represents an alkyl group only when R 4 represents a hydrogen atom; R 6 represents a lower alkyl group having from 1 to 4 carbon atoms, an aryl group, or an aralkyl group; and X and Y each represent hydrogen or a chlorine atom.
Claim 4
Dependent Claim
13 words
The pressure-sensitive copy system of claim 2 wherein said microcapsules additionally contain 2-anilino-6-diethylaminofluoran.
Claim 5
Dependent Claim
42 words
The pressure-sensitive copy system of claim 1 wherein R 1 and R 2 represent an ethyl group, R 3 , R 4 , R 5 , X and Y represent hydrogen and R 6 represents a phenyl group, said compound being 2-(N'-phenyl-N-phenylureido)-6-diethylaminofluoran.
Claim 6
Dependent Claim
45 words
The pressure-sensitive copy system of claim 1 wherein R 1 and R 2 represent an ethyl group, R 3 , R 5 , X and Y represent hydrogen, R 4 represents a methyl group and R 6 represents a phenyl group, said compound being 2-(N'-phenyl-N-phenylureido)-3-methyl-6-diethylaminofluoran.
Claim 7
Dependent Claim
128 words
The pressure-sensitive copy system of claim 1 wherein said microcapsules additionally contain a chromogenic precursor having the formula ##STR7## wherein R 1 and R 2 each represent an alkyl group; R 3 and R 4 each represent a hydrogen atom, a halogen atom, an alkyl group, a nitro group, an amino group, an acyl group, or a carboalkoxy group; R 5 represents a hydrogen atom or an alkyl group, with the proviso that R 5 represents an alkyl group only when R 4 represents a hydrogen atom; X and Y each represent a hydrogen atom, a halogen atom, a nitro group, a lower alkyl group, an aryl group, an alkoxy group, or a carboalkoxy group; and said chromogen and said chromogen precursor providing a black-image forming chromogenic admixture.
Claim 8
Dependent Claim
30 words
The pressure-sensitive copy system of claim 6 wherein the ratio of chromogen to chromogen precursor is between about 0.2 and about 0.9 mole of chromogen per mole of chromogen precursor.
Claim 9
Dependent Claim
31 words
The copy system of claim 1 wherein said microcapsules have walls formed by the reaction of a poly-functional isocyanate and an organic, polymeric emulsifying agent containing a plurality of hydroxyl groups.
Claim 10
Dependent Claim
17 words
the copy system of claim 8 wherein said isocyanate is an adduct of toluene diisocyanate and trimethylolpropane.
Claim 11
Dependent Claim
13 words
The copy system of claim 9 wherein said emulsifying agent is polyvinyl alcohol.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-31 | 1982-01-30 | 1982-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-31 | 1986-01-30 | 1986-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-31 | 1990-01-30 | 1990-08-01 | $7700.00 | Window Closed / Lapsed |