Patent US4299411A successfully refreshed from Google Patents.
US4299411A
Expired / Lapsed
US
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Pressure-sensitive record material
Assignee: WTA Inc
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Filing: 1979-06-05
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Granted: 1981-11-10
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Expires: 1999-06-05
Abstract
Abstract A pressure-sensitive record material comprising the colorless chromogenic dye Pyridyl Blue mixed with and adsorbed onto a pigment which is coated on a substrate sheet, and capsules containing an acidic resin dissolved in a suitable solvent, the capsules being coated on the same or an additional sheet. This "reverse" system (where the acidic resin rather than the dye is encapsulated) provides an improved community of properties, including improved image strength, print stability (fade resistance) and resistance to degradation. Pyridyl Blue is a mixture of the isomers 7-(1-ethyl-2-methylindol-3-yl)-7-(4-diethylamino-2-ethoxyphenyl)-5,7-d ihydrofuro[3,4-b]pyridin-5-one and 5-(1-ethyl-2-methylindol-3-yl)-5-(4-diethylamino-2-ethoxyphenyl)-5,7-d ihydrofuro[3,4-b]pyridin-7-one.
Inventors
- 👤 Bruce W. Brockett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:37
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/145; C; C09; C09B; C09B11/00; C09B11/04; C09B11/26; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/25; Y10T428/258; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
22 words
A pressure-sensitive record sheet material which comprises a substrate coated with a water-insoluble, approximately chemically neutral pigment having Pyridyl Blue adsorbed thereon.
Claim 2
Dependent Claim
22 words
A pressure-sensitive record sheet material which comprises a substrate coated with a water-insoluble, approximately chemically neutral pigment having Pyridyl Blue adsorbed thereon.
Claim 3
Dependent Claim
12 words
The record sheet of claim 1, wherein said pigment is calcium carbonate.
Claim 4
Dependent Claim
18 words
The record sheet of claim 1, further including at least one binder for said pigment in the coating.
Claim 5
Dependent Claim
11 words
The record sheet of claim 3, wherein said binder is starch.
Claim 6
Dependent Claim
13 words
The record sheet of claim 1, wherein said substrate is a paper sheet.
Claim 7
Dependent Claim
43 words
A pressure-sensitive record sheet material which comprises a substrate coated with a water-insoluble, approximately chemically neutral pigment having Pyridyl Blue adsorbed thereon, and pressure rupturable capsules containing an organic solvent solution of a resin reactive with Pyridyl Blue to form a colored mark.
Claim 8
Dependent Claim
43 words
A pressure-sensitive record sheet material which comprises a substrate coated with a water-insoluble, approximately chemically neutral pigment having Pyridyl Blue adsorbed thereon, and pressure rupturable capsules containing an organic solvent solution of a resin reactive with Pyridyl Blue to form a colored mark.
Claim 9
Dependent Claim
13 words
The record sheet of claim 6, wherein said resin is a novolak resin.
Claim 10
Dependent Claim
18 words
The record sheet of claim 7, wherein said novolak resin is a para-phenylphenol-formaldehyde resin or a para-octylphenol-formaldehyde resin.
Claim 11
Dependent Claim
12 words
The record sheet of claim 8, wherein said pigment is calcium carbonate.
Claim 12
Dependent Claim
18 words
The record sheet of claim 6, further including at least one binder for said pigment in the coating.
Claim 13
Dependent Claim
25 words
The record sheet of claim 6, wherein said pigment having Pyridyl Blue adsorbed thereon and said pressure rupturable capsules comprise separate coatings on said substrate.
Claim 14
Dependent Claim
24 words
The record sheet of claim 6, wherein said pigment having Pyridyl Blue adsorbed thereon and said pressure rupturable capsules are interspersed on said substrate.
Claim 15
Dependent Claim
50 words
A pressure-sensitive record sheet material comprising a first substrate having a coating of pressure rupturable capsules containing an organic solvent solution of an acidic resin superimposed on a second substrate coated with a water-insoluble, approximately chemically neutral pigment having Pyridyl Blue adsorbed thereon, the two coatings being in contiguous juxtaposition.
Claim 16
Dependent Claim
50 words
A pressure-sensitive record sheet material comprising a first substrate having a coating of pressure rupturable capsules containing an organic solvent solution of an acidic resin superimposed on a second substrate coated with a water-insoluble, approximately chemically neutral pigment having Pyridyl Blue adsorbed thereon, the two coatings being in contiguous juxtaposition.
Claim 17
Dependent Claim
12 words
The record sheet of claim 13, wherein said pigment is calcium carbonate.
Claim 18
Dependent Claim
22 words
The record sheet of claim 13, wherein the coating on said second substrate further includes at least one binder for said pigment.
Claim 19
Dependent Claim
13 words
The record sheet of claim 13, wherein said resin is a novolak resin.
Claim 20
Dependent Claim
18 words
The record sheet of claim 16, wherein said novolak resin is a para-phenylphenol-formaldehyde resin or a para-octylphenol-formaldehyde resin.
Claim 21
Dependent Claim
17 words
A manifold assembly comprising a plurality of coated first and second substrates as defined in claim 13.
Claim 22
Dependent Claim
17 words
Minute particles of a water-insoluble, approximately chemically neutral pigment having Pyridyl Blue mixed with and adsorbed thereon.
Claim 23
Dependent Claim
17 words
Minute particles of a water-insoluble, approximately chemically neutral pigment having Pyridyl Blue mixed with and adsorbed thereon.
Claim 24
Dependent Claim
12 words
The minute particles of claim 19, wherein said pigment is calcium carbonate.
Claim 25
Dependent Claim
22 words
A paper coating slurry comprising water, a water-insoluble, approximately chemically neutral pigment having Pyridyl Blue adsorbed thereon, and at least one binder.
Claim 26
Dependent Claim
22 words
A paper coating slurry comprising water, a water-insoluble, approximately chemically neutral pigment having Pyridyl Blue adsorbed thereon, and at least one binder.
Claim 27
Dependent Claim
13 words
The paper coating slurry of claim 21, wherein said pigment is calcium carbonate.
Claim 28
Dependent Claim
14 words
The paper coating slurry of claim 21, wherein the binder is a styrene-butadiene latex.
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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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |