US4009527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coordinated color chart system, and method for producing same
Assignee: United States Department of the Interior
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Filing: 1975-11-06
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Granted: 1977-03-01
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Expires: 1995-11-06
Abstract
Abstract Three colorants are arranged along three mutually intersecting edges of a color cube, one colorant to each edge, with the amount of each colorant varying from the intersection base corner of the cube to the corresponding outer cube corners. Diagonal planes are then taken through the color cube perpendicular to a diagonal line running from the intersection base cube corner to the diagonally opposite corner of the cube, one plane for each color chart of the system. A plurality of points are selected on each plane, one for each color on the associated chart, the amount of each of the three colorants required to make the chart colors being determined by the points selected on the plane.
Inventors
- 👤 Camilla Ann Scott
- 👤 Elizabeth L. Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:42
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/003; B41; B41M; B41M1/00; B41M1/14; B41M3/00; B41M3/005; G; G01; G01J; G01J3/00; G01J3/46; G01J3/52; G03; G03C; G03C7/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
A color chart displaying a plurality of coordinated distinct colors, each coordinated color on said chart being obtained by utilizing specific amounts of each of only independently variable, constant tint density colorants yellow, magenta, and cyan, and being represented by a specific point in a plane disposed perpendicular to a line drawn between one point and another point diagonally opposite thereto within the space of a color cube on which said colorants are arranged along three mutually perpendicular edges of said cube mutually intersecting at said one point, one of said colorants corresponding to each edge with the amount of each colorant uniformly and progressively increasing along its respective edge from a minimum at said one point to a maximum at corresponding cube corners, and wherein there is associated with each said specific point on said plane a unique combination of amounts of each said colorants which is characterized by a constant tint density.
Claim 2
Dependent Claim
154 words
A color chart displaying a plurality of coordinated distinct colors, each coordinated color on said chart being obtained by utilizing specific amounts of each of only independently variable, constant tint density colorants yellow, magenta, and cyan, and being represented by a specific point in a plane disposed perpendicular to a line drawn between one point and another point diagonally opposite thereto within the space of a color cube on which said colorants are arranged along three mutually perpendicular edges of said cube mutually intersecting at said one point, one of said colorants corresponding to each edge with the amount of each colorant uniformly and progressively increasing along its respective edge from a minimum at said one point to a maximum at corresponding cube corners, and wherein there is associated with each said specific point on said plane a unique combination of amounts of each said colorants which is characterized by a constant tint density.
Claim 3
Dependent Claim
187 words
A series of related color charts each displaying a plurality of coordinated distinct colors, each coordinated color on a said chart being obtained by utilizing specific amounts of each of only independently variable, constant tint density colorants yellow, magenta, and cyan, and being represented by a specific point in a plane disposed perpendicular to a line drawn between one point and another point diagonally opposite thereto within the space of a color cube, there being a separate plane disposed perpendicular to said diagonal line associated with each of said color charts, said planes being spaced from each other along said diagonal line, said colorants being arranged along three mutually perpendicular edges of said cube mutuallly intersecting at said one point, one of said colorants corresponding to each edge with the amount of each colorant uniformly and progressively increasing along its respective edge from a minimum at said one point to a maximum at corresponding cube corners, and wherein there is associated with each said specific point on each said plane a unique combination of amounts of each said colorants which is characterized by a constant tint density.
Claim 4
Dependent Claim
187 words
A series of related color charts each displaying a plurality of coordinated distinct colors, each coordinated color on a said chart being obtained by utilizing specific amounts of each of only independently variable, constant tint density colorants yellow, magenta, and cyan, and being represented by a specific point in a plane disposed perpendicular to a line drawn between one point and another point diagonally opposite thereto within the space of a color cube, there being a separate plane disposed perpendicular to said diagonal line associated with each of said color charts, said planes being spaced from each other along said diagonal line, said colorants being arranged along three mutually perpendicular edges of said cube mutuallly intersecting at said one point, one of said colorants corresponding to each edge with the amount of each colorant uniformly and progressively increasing along its respective edge from a minimum at said one point to a maximum at corresponding cube corners, and wherein there is associated with each said specific point on each said plane a unique combination of amounts of each said colorants which is characterized by a constant tint density.
Claim 5
Dependent Claim
38 words
A series of related color charts as set forth in claim 2, wherein said perpendicular planes are spaced equally along said diagonal line, whereby said charts form a linear scale relationship generally corresponding to a linear gray scale.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |