US5174758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color selector for four-color offset printing, and method of creating it
Assignee: Individual
•
Filing: 1990-12-11
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Granted: 1992-12-29
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Expires: 2010-12-11
Abstract
Abstract A color swatch arrangement for use in selecting colors for four-color offset printing, and a method for creating such an arrangement, involves dividing the visible spectrum into a plurality of distinct hues, and determining the proportions of yellow, red, and blue dot densities needed to create color swatches of each distinct hue. A series of lighter-and-lighter tint swatches associated with each distinct hue are created by reducing each of the yellow, red, and blue dot densities in steps. A series of darker shade swatches is created by adding a proportion of black dot density to each distinct hue and all the stepped lighter tints created from it, and a series of darker-and-darker shade swatches are produced by adding greater proportions of black dot density in stages to all the stepped lighter tints.
Inventors
- 👤 Steven J. Abramson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:50
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/003; G; G01; G01J; G01J3/00; G01J3/46; G01J3/52
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
203 words
A method of creating a multiplicity of color swatches for use in selecting colors for four-color offset printing, comprising the steps of: (a) dividing the visible spectrum into a plurality of distinct hues, each hue being perceptually different to the naked eye from the hues immediately preceding and succeeding it, (b) determining the proportion of yellow, red, and blue dot density needed to create color swatches of each of those distinct hues, (c) for each distinct hue, reducing each of the yellow, red, and blue dot density in steps, the percentage of reduction in each step being the same for each of the yellow, red, and blue dot density, to create lighter-and-lighter tint swatches, (d) adding a particular proportion of black dot density to each distinct hue and all the stepped lighter tints created from it to produce a series of darker shade swatches, (e) adding greater proportions of black dot density in stages to all the stepped lighter tints crated from each distinct hue to produce darker-and-darker shade swatches of each tint, the proportion of black dot density added to each tint at each stage being the same, and (f) preparing individual color swatches bearing each of said hues, tints, and shades.
Claim 2
Independent Claim
203 words
A method of creating a multiplicity of color swatches for use in selecting colors for four-color offset printing, comprising the steps of: (a) dividing the visible spectrum into a plurality of distinct hues, each hue being perceptually different to the naked eye from the hues immediately preceding and succeeding it, (b) determining the proportion of yellow, red, and blue dot density needed to create color swatches of each of those distinct hues, (c) for each distinct hue, reducing each of the yellow, red, and blue dot density in steps, the percentage of reduction in each step being the same for each of the yellow, red, and blue dot density, to create lighter-and-lighter tint swatches, (d) adding a particular proportion of black dot density to each distinct hue and all the stepped lighter tints created from it to produce a series of darker shade swatches, (e) adding greater proportions of black dot density in stages to all the stepped lighter tints crated from each distinct hue to produce darker-and-darker shade swatches of each tint, the proportion of black dot density added to each tint at each stage being the same, and (f) preparing individual color swatches bearing each of said hues, tints, and shades.
Claim 3
Dependent Claim
28 words
A method as defined in claim 1 wherein the percentage reductions of yellow, red, and blue dot density from step-to-step are approximately equal for most of the steps.
Claim 4
Dependent Claim
33 words
A method as defined in claim 2 wherein the yellow, red, and blue dot densities are reduced in increments of about 15%, of the original dot density for that color, at each step.
Claim 5
Dependent Claim
21 words
A method as defined in claim 1 wherein the increased proportions of black dot density added at each stage are equal.
Claim 6
Dependent Claim
19 words
A method as defined in claim 4 wherein the black dot density is increased in 6% increments from stage-to-stage.
Claim 7
Dependent Claim
20 words
A method as defined in claim 1 wherein the visible spectrum is divided into about 40 to 50 distinct hues.
Claim 8
Dependent Claim
36 words
A method as defined in claim 1 wherein the stepwise reduction of yellow, red, and blue dot density in each distinct hue swatch produces about seven different tint swatches in addition to the distinct hue swatch.
Claim 9
Dependent Claim
31 words
A method as defined in claim 1 wherein the black dot density is increased in about seven stages to produce about 64 shade swatches for each of the distinct hue swatches.
Claim 10
Dependent Claim
199 words
A color swatch arrangement for use in selecting colors for four-color offset printing, comprising: (a) a plurality of distinct hue swatches extending from one end of the visible spectrum to the other, the hue of each swatch being perceptually different to the naked eye from the hues of the swatches immediately preceding and succeeding it, and each hue swatch being a combination of certain proportions of yellow, red, and blue dot density, (b) a series of lighter-and-lighter tint swatches associated with each distinct hue swatch, the tint swatches being produced by reducing each of the yellow, red, and blue dot density in steps, the percentage of reduction in each step being the same for each of the yellow, red, and blue dot density, (c) a series of darker shades swatches produced by adding a particular proportion of black dot density to each distinct hue and all the stepped lighter tints created from it, and (d) a series of darker-and-darker shade swatches produced by adding greater proportions of black dot density in stages to all the stepped lighter tints created from each distinct hue, the proportion of black dot density added to each tint at each stage being the same.
Claim 11
Dependent Claim
199 words
A color swatch arrangement for use in selecting colors for four-color offset printing, comprising: (a) a plurality of distinct hue swatches extending from one end of the visible spectrum to the other, the hue of each swatch being perceptually different to the naked eye from the hues of the swatches immediately preceding and succeeding it, and each hue swatch being a combination of certain proportions of yellow, red, and blue dot density, (b) a series of lighter-and-lighter tint swatches associated with each distinct hue swatch, the tint swatches being produced by reducing each of the yellow, red, and blue dot density in steps, the percentage of reduction in each step being the same for each of the yellow, red, and blue dot density, (c) a series of darker shades swatches produced by adding a particular proportion of black dot density to each distinct hue and all the stepped lighter tints created from it, and (d) a series of darker-and-darker shade swatches produced by adding greater proportions of black dot density in stages to all the stepped lighter tints created from each distinct hue, the proportion of black dot density added to each tint at each stage being the same.
Claim 12
Dependent Claim
30 words
A color swatch arrangement as defined in claim 1 wherein the percentage reductions of yellow, red, and blue dot density from step-to-step are approximately equal for most of the steps.
Claim 13
Dependent Claim
35 words
A color swatch arrangement as defined in claim 10 wherein the yellow, red, and blue dot densities are reduced in increments of about 15%, of the original dot density for that hue, at each step.
Claim 14
Dependent Claim
23 words
A color swatch arrangement as defined in claim 9 wherein the increased proportions of black dot density added at each stage are equal.
Claim 15
Dependent Claim
21 words
A color swatch arrangement as defined in claim 12 wherein the black dot density is increased in 6% increments from stage-to-stage.
Claim 16
Dependent Claim
19 words
A color swatch arrangement as defined in claim 9 wherein there are about 40 to 45 distinct hue swatches.
Claim 17
Dependent Claim
38 words
A color swatch arrangement as defined in claim 9 wherein the stepwise reduction of yellow, red, and blue dot density in each distinct hue swatch produces about seven different tint swatches in addition to the distinct hue swatch.
Claim 18
Dependent Claim
32 words
A color arrangement as defined in claim 9 wherein the black dot density is increased in about seven stages to produce about 64 shade swatches for each of the distinct hue swatches.
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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) | 1995-12-29 | 1996-06-29 | 1996-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-29 | 2000-06-29 | 2000-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-29 | 2004-06-29 | 2004-12-29 | $7700.00 | Window Closed / Lapsed |