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US4422671A
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Coating compositions for the production of a recording material
Assignee: Novartis Corp
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Filing: 1982-06-30
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Granted: 1983-12-27
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Expires: 2002-06-30
Abstract
Abstract Coating compositions for the production of a pressure-sensitive recording material based on a color former composition and a color developer composition. The color developer composition contains, as developer, at least two water-soluble inorganic metal salts, at least one of which is a nitrate, and is preferably in the form of a wax emulsion. Preferred color developers are mixtures of halides and nitrates.
Inventors
- 👤 Manuel Cespon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:43
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; B41M5/1555
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
58 words
A color-developing sheet for pressure-sensitive recording material, consisting of at least one substrate sensitized with a color-developing composition, containing a color developer consisting essentially of at least two water-soluble, inorganic, metal salts, including at least one nitrate with a molecular weight of 150 to 350 and at least one halide with a molecular weight of 120 to 280.
Claim 2
Dependent Claim
58 words
A color-developing sheet for pressure-sensitive recording material, consisting of at least one substrate sensitized with a color-developing composition, containing a color developer consisting essentially of at least two water-soluble, inorganic, metal salts, including at least one nitrate with a molecular weight of 150 to 350 and at least one halide with a molecular weight of 120 to 280.
Claim 3
Dependent Claim
31 words
A color-developing sheet of claim 1, wherein the color-developing composition has been applied to the substrate in a wax emulsion, at a temperature in the range of 20° to 180° C.
Claim 4
Dependent Claim
19 words
A color-developing sheet of claim 2, wherein the application temperature is in the range of 50° to 160° C.
Claim 5
Dependent Claim
45 words
A color-developing sheet of claim 1, wherein the metals of the metal salts are selected from the group consisting of aluminum, barium, lead, cadmium, calcium, chromium, iron, gallium, cobalt, copper, magnesium, manganese, molybdenum, nickel, mercury, silver, strontium, tantalum, titanium, vanadium, tungsten, zinc, tin and zirconium.
Claim 6
Dependent Claim
23 words
A color-developing sheet of claim 4, wherein the metal is selected from the group consisting of tin, zinc, manganese, iron, nickel and cobalt.
Claim 7
Dependent Claim
10 words
A color-developing sheet of claim 5, further containing maleic acid.
References Cited (Backward Citations)
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Cited
US3843384A
Cited
US3952132A
Cited
GB1472580A
Cited
US4096314A
Cited
US4183553A
Cited
US4348234A
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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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |