US3849164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive record unit comprising a mixture of two chromogenic compounds
Assignee: WTA Inc
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Filing: 1972-05-09
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Granted: 1974-11-19
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Expires: 1992-05-09
Abstract
Abstract A pressure-sensitive record unit comprising: (a) a support sheet and (b) mark-forming components and a releasable liquid solvent for said mark-forming components arranged in contiguous juxtaposition and supported by said sheet. Said mark-forming components consisting essentially of a mixture of two chromogenic compounds of normally colorless form is disclosed, wherein the mixture, on reaction with an acidic material, exhibits a neutralcolored form. Examples of the first chromogenic compound include 2''-anilino-6''-diethylaminofluoran and 2''-(methoxymethyl) amino6''-diethylaminofluoran and examples of the second chromogenic compound include 2''-chloro-6''-diethylamino-3''-methylfluoran and 2''-acetamido-6''-diethylaminofluoran.
Inventors
- 👤 H Schwab
- 👤 T Hoover
- 👤 C Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:42
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/145; B41M5/1455
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
124 words
A PRESSURE SENSITIVE RECORD UNIT COMPRISING: (A) SUPPORT WEB OR SHEET MATERIAL, (B) MARK-FORMING COMPONENTS AND A RELEASABLE LIQUID SOLVENT FOR SAID MARK-FORMING COMPONENTS ARRANGED IN CONTIGUOUS JUXTAPOSITION AND SUPPORTED BY SAID SHEET MATERIAL, (C) SAID MARK-FORMING COMPONENTS CONSISTING ESSENTIALLY OF A MIXTURE OF TWO COLORLESS BUT COLORABLE CHROMOGENIC COMPOUNDS WHEREIN THE FIRST CHROMOGENIC COMPOUND HAS A GENERALLY GREEN APPERANCE AND EXHIBITS TWO LIGHT ABSORPTION PEAKS-ONE IN THE RANGE OF 400 TO 500 MILLIMICRONS AND ANOTEHR IN THE RANGE OF 550 TO 650 MILLIMICRONS-IN ITS COLORED FORM A WHEREIN THE SECOND CHROMOGENIC COMPOUND EXHIBITS A SINGLE ABSORPTION PEAK IN THE RANGE OF 500 TO 600 MILLIMICRONS IN ITS COLORED FORM; THE MIXTURE, ADDITIONALLY, CONSISTING ESSENTIALLY OF A FIRST CHROMOGENIC COMPOUND REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
124 words
A PRESSURE SENSITIVE RECORD UNIT COMPRISING: (A) SUPPORT WEB OR SHEET MATERIAL, (B) MARK-FORMING COMPONENTS AND A RELEASABLE LIQUID SOLVENT FOR SAID MARK-FORMING COMPONENTS ARRANGED IN CONTIGUOUS JUXTAPOSITION AND SUPPORTED BY SAID SHEET MATERIAL, (C) SAID MARK-FORMING COMPONENTS CONSISTING ESSENTIALLY OF A MIXTURE OF TWO COLORLESS BUT COLORABLE CHROMOGENIC COMPOUNDS WHEREIN THE FIRST CHROMOGENIC COMPOUND HAS A GENERALLY GREEN APPERANCE AND EXHIBITS TWO LIGHT ABSORPTION PEAKS-ONE IN THE RANGE OF 400 TO 500 MILLIMICRONS AND ANOTEHR IN THE RANGE OF 550 TO 650 MILLIMICRONS-IN ITS COLORED FORM A WHEREIN THE SECOND CHROMOGENIC COMPOUND EXHIBITS A SINGLE ABSORPTION PEAK IN THE RANGE OF 500 TO 600 MILLIMICRONS IN ITS COLORED FORM; THE MIXTURE, ADDITIONALLY, CONSISTING ESSENTIALLY OF A FIRST CHROMOGENIC COMPOUND REPRESENTED BY THE FORMULA:
Claim 3
Dependent Claim
18 words
The record unit of claim 1 where the electron-accepting material of the Lewis acid type comprises a clay.
Claim 4
Dependent Claim
21 words
The record unit of claim 1 where the electron-accepting material of the Lewis acid type comprises at least one organic polymer.
Claim 5
Dependent Claim
14 words
The record unit of claim 3 where the organic polymer is a phenolic polymer.
Claim 6
Dependent Claim
30 words
The record unit of claim 1 wherein at least one of the mark-forming components is maintained in isolation from the other mark-forMing components prior to the release of the solvent.
Claim 7
Dependent Claim
18 words
The record unit of claim 1 wherein the liquid solvent is present as the nucleus of a microcapsule.
Claim 8
Dependent Claim
19 words
The record unit of claim 1 wherein the mixture is dissolved in the liquid solvent prior to pressure release.
Claim 9
Dependent Claim
21 words
The record unit of claim 1 wherein the mark-forming components and the liquid solvent are present in a single support sheet.
Claim 10
Dependent Claim
42 words
The record unit of claim 1 wherein at least one member selected from the group consisting of the mark-forming components and the liquid solvent is present in a support sheet other than the support sheet having the remaining members of the group.
Claim 11
Dependent Claim
174 words
A mark-forming unit, comprising: a first web or sheet having on one surface a transfer coating which contains as a finely dispersed phase a plurality of minute, pressure-rupturable capsules containing as an inner phase a solvent vehicle; a second web or sheet having an adherent coating upon its surface or dispersed within said web or sheet, said first and second webs or sheets being maintained disposed together in face-to-face relationship with said respective transfer and adherent coatings in contiguity with each other; a first coating constituent in the form of a mixture of only two colorless but colorable chromogenic compounds wherein the first chromogenic compound has a generally green appearance and exhibits two light absorption peaks-one in the range of 400 to 500 millimicrons and another in the range of 550 to 650 millimicrons-in its colored form and wherein the second chromogenic compound exhibits a single absorption peak in the range of 500 to 600 millimicrons in its colored form; the mixture, additionally, consistng essentially of a first chromogenic compound represented by the formula:
Claim 12
Dependent Claim
174 words
A mark-forming unit, comprising: a first web or sheet having on one surface a transfer coating which contains as a finely dispersed phase a plurality of minute, pressure-rupturable capsules containing as an inner phase a solvent vehicle; a second web or sheet having an adherent coating upon its surface or dispersed within said web or sheet, said first and second webs or sheets being maintained disposed together in face-to-face relationship with said respective transfer and adherent coatings in contiguity with each other; a first coating constituent in the form of a mixture of only two colorless but colorable chromogenic compounds wherein the first chromogenic compound has a generally green appearance and exhibits two light absorption peaks-one in the range of 400 to 500 millimicrons and another in the range of 550 to 650 millimicrons-in its colored form and wherein the second chromogenic compound exhibits a single absorption peak in the range of 500 to 600 millimicrons in its colored form; the mixture, additionally, consistng essentially of a first chromogenic compound represented by the formula:
Claim 13
Dependent Claim
19 words
The mark-forming unit of claim 10 in which the electron-accepting material of the Lewis acid type comprises a clay.
Claim 14
Dependent Claim
20 words
The mark-forming unit of claim 10 in which the electron-accepting material of the Lewis acid type comprises an organic polymer.
Claim 15
Dependent Claim
15 words
The mark-forming unit of claim 12 in which the organic polymer is a phenolic polymer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |