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US4680056A Expired / Lapsed US ⏱️ 0.0 years remaining

Carbonless paper solvent utilizing triisopropyltoluene

Assignee: Koch Industries Inc
•
Filing: 1986-01-23
•
Granted: 1987-07-14
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Expires: 2006-01-23
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Abstract

Abstract A carbonless paper solvent, a method of solubilizing a chromogenic material, and a recording sheet, all utilizing triisopropyltoluene, are the subject of the present invention. Triisopropyltoluene may be obtained by the alkylation of toluene and the resulting product will normally contain the 2,3,5, the 2,4,5 and the 2,4,6 isomers. The triisopropyltoluene may be combined with other known dye solvents such as alkylated naphthalenes, diarylmethanes and alkylated biphenyls to present a carbonless paper solvent or it may be utilized alone. The triisopropyltoluene will normally be present in a quantity of at least 40% by weight of the total solvent. A recording sheet may be formed by a paper which is coated with a continuous layer of microcapsules containing chromogenic marking material and a solvent comprising triisopropyltoluene.

Inventors

  • 👤 Andrew P. Komin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 06:43
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; B41M5/1655

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 29 words
A solvent for dye used in pressure sensitive copying paper comprising (a) one or more members of the group comprising alkylated napthalenes, diarylmethanes and alkylated biphenyls and (b) triisopropyltoluene.
Claim 2
Dependent Claim 29 words
A solvent for dye used in pressure sensitive copying paper comprising (a) one or more members of the group comprising alkylated napthalenes, diarylmethanes and alkylated biphenyls and (b) triisopropyltoluene.
Claim 3
Dependent Claim 23 words
A solvent as called for by claim 1, wherein said triisopropyltoluene is present in a quantity of at least about 40% by weight.
Claim 4
Dependent Claim 25 words
A solvent as called for by claim 1, wherein said triisopropyltoluene is present in a quantity of between about 40% and about 70% by weight.
Claim 5
Dependent Claim 16 words
A solvent as called for by claim 1, wherein said triisopropyltoluene comprises primarily 2,4,6-triisopropyltoluene and 2,4,5-triisopropyltoluene.
Claim 6
Dependent Claim 23 words
A solvent as called for by claim 1, wherein said triisopropyltoluene comprises at least 90% by weight of the isomers 2,4,6-triisopropyltoluene and 2,4,5-triisopropyltoluene.
Claim 7
Independent Claim 18 words
A method of solubilizing a chromogenic material, said method comprising the steps of dissolving said material in triisopropyltoluene.
Claim 8
Independent Claim 18 words
A method of solubilizing a chromogenic material, said method comprising the steps of dissolving said material in triisopropyltoluene.
Claim 9
Dependent Claim 26 words
A method as set forth in claim 6, wherein said dissolving step comprises dissolving said material in a solvent comprising at least 40% by weight triisopropyltoluene.
Claim 10
Dependent Claim 29 words
A method as set forth in claim 6, wherein said dissolving step comprises dissolving said material in a solvent comprising from about 40% to about 70% by weight triisopropyltoluene.
Claim 11
Dependent Claim 26 words
A method as set forth in claim 6, wherein said dissolving step comprises dissolving said material in a solvent comprising at least 40% by weight 2,4,6-triisopropyltoluene.
Claim 12
Dependent Claim 37 words
A method as set forth in claim 6, wherein said dissolving step comprises dissolving said material in a solvent comprising at least 40% by weight triisopropyltoluene wherein the isomer distribution is 40% to 90% 2,4,6- and 2,4,5-triisopropyltoluene.

References Cited (Backward Citations)

US3429827A Cited
US4124227A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-07-13 1991-01-12 1991-07-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-07-13 1995-01-12 1995-07-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-07-13 1999-01-12 1999-07-14 $7700.00 Window Closed / Lapsed

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