US4186243A
Expired / Lapsed
US
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Image producing system
Assignee: BASF Corp
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Filing: 1977-02-11
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Granted: 1980-01-29
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Expires: 1997-02-11
Abstract
Abstract An image producing system is provided, wherein an activator composition e.g. made up as a crayon or pencil, when contacted with paper substrate containing an azo color former yields an image by color change.
Inventors
- 👤 James H. Astbury
- 👤 Barrie Broadbent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:32
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; C; C09; C09B; C09B29/00; C09B29/06; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
162 words
An image producing system, which comprises (a) a paper substrate impregnated or coated with a composition comprising an azo color former and (b) a solid activator composition in the form of a crayon or a pencil, said activator composition comprising a clay capable of activating said color former, a solid organic carrier for the clay and an organic oily liquid solvent having low volatility, the color former having the general formula I ##STR20## in which R 1 , R 2 and R 3 each represents hydrogen, halogen, alkyl, alkoxy, aryloxy, alkoxycarbonyl, dialkylaminocarbonyl, acylamino, acyl(alkyl)amino, ##STR21## in which Y 1 and Y 2 each represents alkyl or aryl, or in which Y 1 and Y 2 together represent an alkylene group; X 1 is hydrogen or an alkyl group, X 2 is an alkyl, cyanoalkyl or arylmethylene group or X 1 and X 2 together represent an alkylene group, X 3 is an alkyl or aryl group and n is 1 or 2.
Claim 2
Dependent Claim
162 words
An image producing system, which comprises (a) a paper substrate impregnated or coated with a composition comprising an azo color former and (b) a solid activator composition in the form of a crayon or a pencil, said activator composition comprising a clay capable of activating said color former, a solid organic carrier for the clay and an organic oily liquid solvent having low volatility, the color former having the general formula I ##STR20## in which R 1 , R 2 and R 3 each represents hydrogen, halogen, alkyl, alkoxy, aryloxy, alkoxycarbonyl, dialkylaminocarbonyl, acylamino, acyl(alkyl)amino, ##STR21## in which Y 1 and Y 2 each represents alkyl or aryl, or in which Y 1 and Y 2 together represent an alkylene group; X 1 is hydrogen or an alkyl group, X 2 is an alkyl, cyanoalkyl or arylmethylene group or X 1 and X 2 together represent an alkylene group, X 3 is an alkyl or aryl group and n is 1 or 2.
Claim 3
Dependent Claim
18 words
A system as claimed in claim 1, in which the clay is Silton, attapulgite, bentonite, silica or montmorillonite.
Claim 4
Dependent Claim
62 words
A system as claimed in claim 1, in which the organic solvent is partially hydrogenated terphenyl, liquid paraffin, mineral oil, tricresyl phosphate, a carboxylic acid ester, trichlorobenzene, glycerol nitrobenzene trichloroethyl phosphate, a water-insoluble hydrocarbon oil, an alkyl phthaloyl butyl glycollate, diethylene glycol, triethylene glycol, a polyethylene glycol having a molecular weight of from 200 to 600, an alkyl naphthalene, or mixtures thereof.
Claim 5
Dependent Claim
19 words
A system as claimed in claim 1, in which the activator also contains a salt of a transition metal.
Claim 6
Dependent Claim
39 words
A system as claimed in claim 1, in which the color former composition for treating the paper is a dispersion of the azo color former in a mixture of water and a water-miscible organic solvent for the color former.
Claim 7
Dependent Claim
16 words
A system as claimed in claim 5 in which the dispersion also contains a polymer latex.
Claim 8
Dependent Claim
30 words
A system as claimed in claim 1, in which the color former composition is an ink which comprises a neutral or substantially neutral ink vehicle and the azo color former.
Claim 9
Dependent Claim
18 words
A system as claimed in claim 7, in which the ink also contains a non-volatile liquid organic base.
Claim 10
Dependent Claim
20 words
A system as claimed in claim 1, in which the color former composition also contains a dyestuff or a pigment.
Claim 11
Dependent Claim
144 words
A system as claimed in claim 1, in which the azo color former is one having the general formula II ##STR22## in which R 4 , R 5 and R 6 each represent lower alkyl, lower alkoxy, halogenphenoxy, phenoxy, lower alkoxycarbonyl, lower dialkylaminocarbonyl, acetylamino, halogen, acetyl (lower alky)amino, ##STR23## in which Y 3 and Y 4 each represents lower alkyl or phenyl, or in which Y 3 and Y 4 together represent an alkylene group with 4 or 5 carbon atoms and, at most two of the radicals R 4 , R 5 and R 6 being hydrogen, X 4 is hydrogen or lower alkyl, X 5 is lower alkyl, lower cyanoalkyl or benzyl, or X 4 and X 5 together represent an alkylene group with 4 or 5 carbon atoms, X 6 is lower alkyl or phenyl and n is 1 or 2.
Claim 12
Dependent Claim
110 words
A system as claimed in claim 10, in which the azo color former is one having the general formula III ##STR24## in which R 7 , R 8 and R 9 each represents methyl, methoxy, phenoxy, dichlorophenoxy, methoxycarbonyl, dimethylaminocarbonyl, acetylamino, chlorine, acetyl(methyl)amino, ##STR25## in which Y 5 and Y 6 each represent methyl, ethyl or phenyl or in which Y 5 and Y 6 together represent a pentylene group, at most two of the radicals, R 7 , R 8 and R 9 being hydrogen, X 7 is methyl or ethyl, X 8 is methyl, 2-cyanoethyl or benzyl, X 9 is methyl or ethyl and n is 1 or 2.
Claim 13
Dependent Claim
43 words
A system as claimed in claim 11, in which the color former is one having the general formula IV ##STR26## in which R 7 , R 8 , R 9 , X 7 and X 8 have the meanings given in claim 11.
Claim 14
Dependent Claim
67 words
A system as claimed in claim 11, in which the color former is one having the general formula V ##STR27## in which R 10 , R 11 and R 12 each represents methoxy, methoxycarbonyl chlorine, diethylaminosulfonyl or acetylamino, at most two of the radicals R 10 , R 11 and R 12 being hydrogen and X 7 and X 8 have the meanings given in claim 11.
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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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |