Patent US4071469A successfully refreshed from Google Patents.
US4071469A
Expired / Lapsed
US
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Solvent composition for use in carbonless copy systems
Assignee: Champion International Corp
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Filing: 1974-08-26
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Granted: 1978-01-31
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Expires: 1994-08-26
Abstract
Abstract A solvent composition for use in carbonless copy systems consisting essentially of a combination of a mono-alkyl naphthalene, wherein said alkyl group contains from 1 to 3 carbon atoms per molecule and a di-alkyl naphthalene, wherein each of said alkyl groups in said di-alkyl naphthalene contains from 2 to 4 carbon atoms per molecule. The solvent is used in the production of microcapsules wherein an isocyanate cross-linking agent is dissolved in the solvent.
Inventors
- 👤 David N. Vincent
- 👤 Cheng Hsiung Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:24
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; B41M5/1655; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
88 words
A solvent composition for use in carbonless copy systems in the absence of a halogenated solvent, wherein said solvent consists essentially of a combination of a mono-alkyl naphthalene, wherein said alkyl group contains from 1 to 3 carbon atoms per molecule, and a di-alkyl naphthalene, wherein each of said alkyl groups in said di-alkyl naphthalene contains from 2 to 4 carbon atoms per molecule, said mono-alkyl naphthalene being present in an amount between about 25 and about 40% by weight of the alkylated naphthalenes present in said solvent.
Claim 2
Dependent Claim
88 words
A solvent composition for use in carbonless copy systems in the absence of a halogenated solvent, wherein said solvent consists essentially of a combination of a mono-alkyl naphthalene, wherein said alkyl group contains from 1 to 3 carbon atoms per molecule, and a di-alkyl naphthalene, wherein each of said alkyl groups in said di-alkyl naphthalene contains from 2 to 4 carbon atoms per molecule, said mono-alkyl naphthalene being present in an amount between about 25 and about 40% by weight of the alkylated naphthalenes present in said solvent.
Claim 3
Dependent Claim
22 words
The solvent composition of claim 1 wherein said composition contains between about 30 and about 35% by weight of said mono-alkyl naphthalene.
Claim 4
Dependent Claim
19 words
The solvent composition of claim 1 wherein said mono-alkyl naphthalene is monoisopropylnaphthalene and said di-alkyl naphthalene is diisopropyl naphthalene.
Claim 5
Dependent Claim
22 words
The solvent composition of claim 1 wherein said composition contains below about 10% by weight of material other than mono- and di-alkylnaphthalenes.
Claim 6
Dependent Claim
13 words
The solvent composition of claim 1 wherein said composition contains a color-forming compound.
Claim 7
Dependent Claim
15 words
The solvent composition of claim 5 wherein said color-forming compound is a dye precursor material.
Claim 8
Dependent Claim
15 words
The solvent composition of claim 6 wherein said dye precursor material is crystal violet lactone.
Claim 9
Dependent Claim
15 words
The solvent composition of claim 6 wherein dye precursor material is benzoyl leuco methylene blue.
Claim 10
Dependent Claim
36 words
The solvent composition of claim 1 wherein said composition contains a polyfunctional isocyanate cross-linking agent selected from the group consisting of the adducts of 4,4'-diphenyl methane diisocyanate, triphenyl methane triisocyanate and toluene diisocyanate with polyhydric alcohols.
Claim 11
Dependent Claim
25 words
The solvent composition of claim 9 wherein said polyfunctional isocyanate cross-linking agent is an adduct of toluene diisocyanate and glycerol, pentaerythritol, hexanetriol or trimethylol propane.
Claim 12
Dependent Claim
21 words
The solvent composition of claim 10 wherein said polyfunctional isocyanate cross-linking agent is an adduct of toluene diisocyanate and trimethylol propane.
Claim 13
Dependent Claim
81 words
A solvent composition for use in carbonless copy systems in the absence of a halogenated solvent wherein said solvent consists essentially of a combination of monoisopropylnaphthalene and a di-alkyl naphthalene, wherin each of said alkyl groups in said di-alkyl naphthalene contains from 2 to 4 carbon atoms per molecule, said monoisopropylnaphthalene being present in an amount between about 25 and about 40 percent by weight of the alkylated naphthalenes present in said solvent, said solvent composition additionally containing crystal violet lactone.
Claim 14
Dependent Claim
81 words
A solvent composition for use in carbonless copy systems in the absence of a halogenated solvent wherein said solvent consists essentially of a combination of monoisopropylnaphthalene and a di-alkyl naphthalene, wherin each of said alkyl groups in said di-alkyl naphthalene contains from 2 to 4 carbon atoms per molecule, said monoisopropylnaphthalene being present in an amount between about 25 and about 40 percent by weight of the alkylated naphthalenes present in said solvent, said solvent composition additionally containing crystal violet lactone.
Claim 15
Dependent Claim
13 words
The solvent composition of claim 12 wherein said di-alkyl naphthalene is diisopropyl naphthalene.
Claim 16
Dependent Claim
16 words
The solvent composition of claim 12 wherein said solvent composition additionally comprises benzoyl leuco methylene blue.
Claim 17
Dependent Claim
36 words
The solvent composition of claim 12 wherein said composition contains a polyfunctional isocyanate cross-linking agent selected from the group consisting of the adducts of 4,4'-diphenyl methane diisocyanate, triphenyl methane triisocyanate and toluene diisocyanate with polyhydric alcohols.
Claim 18
Dependent Claim
25 words
The solvent composition of claim 15 wherein said polyfunctional isocyanate cross-linking agent is an adduct of toluene diisocyanate and glycerol, pentaerythritol, hexametriol or trimethylol propane.
Claim 19
Dependent Claim
21 words
The solvent composition of claim 16 wherein said polyfunctional isocyanate cross-linking agent is an adduct of toluene diisocyanate and trimethylol propane.
Claim 20
Dependent Claim
67 words
A solvent composition for use in carbonless copy systems in the absence of a halogenated solvent, wherein said solvent composition consists essentially of a combination of monoisopropylnaphthalene and diisopropyl naphthalene, said monoisopropylnaphthalene being present in an amount between about 25 and about 40 percent by weight of the alkylated naphthalenes present in said solvent, said solvent composition additionally containing crystal violet lactone and benzoyl leuco methylene blue.
Claim 21
Dependent Claim
67 words
A solvent composition for use in carbonless copy systems in the absence of a halogenated solvent, wherein said solvent composition consists essentially of a combination of monoisopropylnaphthalene and diisopropyl naphthalene, said monoisopropylnaphthalene being present in an amount between about 25 and about 40 percent by weight of the alkylated naphthalenes present in said solvent, said solvent composition additionally containing crystal violet lactone and benzoyl leuco methylene blue.
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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) | 1981-01-30 | 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 |