US4662737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing color display device of copying machine
Assignee: Sharp Corp
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Filing: 1985-12-12
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Granted: 1987-05-05
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Expires: 2005-12-12
Abstract
Abstract A developing color display device of a copying machine including a control circuit for outputting a signal corresponding to the developing color in a development cell, light emitting bodies of three primary colors (red, blue and green) that are selectively turned ON and/or whose luminous intensities are changed according to the signal output from the control circuit, and a developing color indicator for presenting a desired developing color synthesized by lights from the three primary color light emitting bodies.
Inventors
- 👤 Tomoaki Ueguri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:19
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/0105; G03G15/0126
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
A developing color display device of a copying machine, comprising: a control circuit for outputting a signal corresponding to the developing color in a development cell; light emitting bodies of three primary colors (red, blue and green) that are selectively turned ON and/or whose luminous intensities are changed according to the signal output from said control circuit; and a developing color indicator for presenting a desired developing color synthesized by lights from said three primary color light emitting bodies.
Claim 2
Dependent Claim
79 words
A developing color display device of a copying machine, comprising: a control circuit for outputting a signal corresponding to the developing color in a development cell; light emitting bodies of three primary colors (red, blue and green) that are selectively turned ON and/or whose luminous intensities are changed according to the signal output from said control circuit; and a developing color indicator for presenting a desired developing color synthesized by lights from said three primary color light emitting bodies.
Claim 3
Dependent Claim
28 words
The developing color display device of the copying machine as claimed in claim 1 in which said developing color indicator contains an irregular reflection filter using a lens.
References Cited (Backward Citations)
US3438709A
Cited
US3825337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |