US4523852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color comparison reference standard and method for using same
Assignee: Bayer Corp
•
Filing: 1983-06-09
•
Granted: 1985-06-18
•
Expires: 2003-06-09
Abstract
Abstract An improved method for visually comparing the results of colorimetric analytical tests to a color reference standard, enabling substantially improved quantitation to be achieved for such tests, is disclosed. Also disclosed is improved apparatus, in the form of an improved color comparision reference standard, which is useful in the method. In one embodiment, the standard can comprise a plurality of colored reference areas of differing hues corresponding to discrete reference values and to which a colored response area of a colorimetric analytical test can be compared to determine the reference value most closely related to the hue of the colored response area, and a background area against which the colored reference areas are displayed. The background area has a luminance (L*) value of from about 15 to about 80, and the luminance (L*) value of any portion of the background area is within about 30 of the average luminance (L*) value of any two or more adjacent ones of the colored reference areas which are displayed against the portion of the background area.
Inventors
- 👤 Robert Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:50
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/52
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
121 words
A color comparison reference standard comprising a plurality of colored reference areas of differing hues corresponding to discrete reference values and to which a colored response area of a colorimetric test means can be compared to determine the reference value most closely related to the hue of the colored response area, and a background area against which said colored reference areas are displayed, said background area having a luminance (L*) value of from about 15 to about 80, the luminance (L*) value of any portion of said background area being within about 30 of the average luminance (L*) value of any two or more adjacent ones of said colored reference areas which are displayed against said portion of said background area.
Claim 2
Dependent Claim
121 words
A color comparison reference standard comprising a plurality of colored reference areas of differing hues corresponding to discrete reference values and to which a colored response area of a colorimetric test means can be compared to determine the reference value most closely related to the hue of the colored response area, and a background area against which said colored reference areas are displayed, said background area having a luminance (L*) value of from about 15 to about 80, the luminance (L*) value of any portion of said background area being within about 30 of the average luminance (L*) value of any two or more adjacent ones of said colored reference areas which are displayed against said portion of said background area.
Claim 3
Dependent Claim
52 words
The color comparison reference standard of claim 1, wherein the luminance (L*) value of any portion of said background area is within about 20 of the average luminance (L*) value of any two or more adjacent ones of said colored reference areas which are displayed against said portion of said background area.
Claim 4
Dependent Claim
51 words
The color comparison reference standard of claim 1, wherein the luminance (L*) value of any portion of said background area is within 10 of the average luminance (L*) value of any two or more adjacent ones of said colored reference areas which are displayed against said portion of said background area.
Claim 5
Dependent Claim
25 words
The color comparison reference standard of claim 1, wherein said plurality of colored reference areas and said background area are printed upon a paper substrate.
Claim 6
Dependent Claim
16 words
The color comparison reference standard of claim 4, wherein said paper substrate has an adhesive backing.
Claim 7
Dependent Claim
66 words
Color matching apparatus comprising a substrate, a colored background area upon said substrate having a luminance (L*) value of from about 15 to about 80, and a plurality of colored areas of differing hues displayed against said background area, said background area further having a luminance (L*) value within about 30 of the average luminance (L*) value of any two adjacent ones of said colored areas.
Claim 8
Dependent Claim
66 words
Color matching apparatus comprising a substrate, a colored background area upon said substrate having a luminance (L*) value of from about 15 to about 80, and a plurality of colored areas of differing hues displayed against said background area, said background area further having a luminance (L*) value within about 30 of the average luminance (L*) value of any two adjacent ones of said colored areas.
Claim 9
Dependent Claim
10 words
The apparatus of claim 6 wherein said substrate is paper.
Claim 10
Dependent Claim
75 words
In a color comparison chart comprising a plurality of colored reference standards for comparing a color response produced by an colorimetric analytical test thereto, the improvement wherein said chart further comprises a background against which said colored reference standards are displayed, said background having a luminance (L*) value of from about 15 to about 80 and within about 30 luminance (L*) units of the average luminance (L*) value of any two adjacent colored reference standards.
Claim 11
Dependent Claim
75 words
In a color comparison chart comprising a plurality of colored reference standards for comparing a color response produced by an colorimetric analytical test thereto, the improvement wherein said chart further comprises a background against which said colored reference standards are displayed, said background having a luminance (L*) value of from about 15 to about 80 and within about 30 luminance (L*) units of the average luminance (L*) value of any two adjacent colored reference standards.
Claim 12
Dependent Claim
59 words
The improved color comparison chart of claim 8, wherein said background of said chart further comprises a color gradient varying from one portion to another thereof such that each of said portions of said background has a luminance (L*) value within about 20 luminance (L*) units of the average luminance (L*) value of any two adjacent colored reference standards.
Claim 13
Dependent Claim
59 words
The improved color comparison chart of claim 8, wherein said background of said chart further comprises a color gradient varying from one portion to another thereof such that each of said portions of said background has a luminance (L*) value within about 10 luminance (L*) units of the average luminance (L*) value of any two adjacent colored reference standards.
Claim 14
Independent Claim
76 words
A method for distinguishing differences in hues of a plurality of colors, which method comprises displaying said colors against a colored background having a luminance (L*) value of from about 15 to 80 and within about 30 luminance (L*) units of the average luminance (L*) value of any two or more adjacent ones of said colors, viewing said adjacent colors displayed against said background and determining the extent of visually perceptible hue differences between said colors.
Claim 15
Independent Claim
76 words
A method for distinguishing differences in hues of a plurality of colors, which method comprises displaying said colors against a colored background having a luminance (L*) value of from about 15 to 80 and within about 30 luminance (L*) units of the average luminance (L*) value of any two or more adjacent ones of said colors, viewing said adjacent colors displayed against said background and determining the extent of visually perceptible hue differences between said colors.
Claim 16
Dependent Claim
39 words
The method of claim 11, further comprising the steps of displaying a third color proximate to said adjacent ones of said colors and determining the extent of visually perceptible hue differences between said third color and said adjacent colors.
Claim 17
Independent Claim
117 words
A method for matching colors comprising the steps of displaying a color to be matched adjacent one or more of the colored areas of color matching apparatus comprising a substrate, a colored background area upon said substrate having a luminance (L*) value of from about 15 to about 80, and a plurality of colored areas of differing hues displayed against said background area, said background area further having a luminance (L*) value within about 30 of the average luminance (L*) value of any two adjacent ones of said color areas and comparing against said background area of such apparatus the hue of said color to be matched and the hues of the colored areas of said apparatus.
Claim 18
Independent Claim
117 words
A method for matching colors comprising the steps of displaying a color to be matched adjacent one or more of the colored areas of color matching apparatus comprising a substrate, a colored background area upon said substrate having a luminance (L*) value of from about 15 to about 80, and a plurality of colored areas of differing hues displayed against said background area, said background area further having a luminance (L*) value within about 30 of the average luminance (L*) value of any two adjacent ones of said color areas and comparing against said background area of such apparatus the hue of said color to be matched and the hues of the colored areas of said apparatus.
References Cited (Backward Citations)
US1070891A
Cited
US1389836A
Cited
US1598899A
Cited
US2074704A
Cited
US2245557A
Cited
US2916963A
Cited
US3438737A
Cited
US3529519A
Cited
US3653771A
Cited
US3791933A
Cited
US4234313A
Cited
US4160646A
Cited
US4330299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |