Patent US5084205A successfully refreshed from Google Patents.
US5084205A
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Ink solution comprising red flourescent materials with a non red visual color
Assignee: Pitney Bowes Inc
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Filing: 1990-11-19
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Granted: 1992-01-28
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Expires: 2010-11-19
Abstract
Abstract Solution inks have been discovered that have an acceptable red fluorescent signal for machine detection while emitting a different visual color in white light. The formulation is based on a combination of a fluorescent dyes and a non red dye belonging to the spectral sensitizer class of dyes. The red fluorescent dye and non-red dye are combined in a resin to form a toner. Because of a bathochronic shift, fluorescence at higher wave lengths is achieved. Upon dissolving the toner in a polar solvent, increased viscosity is achieved which results in an enhanced fluorescent signal as compared to prior fluorescent inks.
Inventors
- 👤 Judith Auslander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:23
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/50; C09K; C09K11/00; C09K11/06; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
A homogeneous solution ink comprising a toner having a red fluorescent dye and a non-red visual dye belonging to the spectral sensitizer class of dyes disposed within a resin and dissolved in a polar organic solvent to form a solution, said non-red visual dye having the characteristic of occasioning a wave length shift of the fluorescent emission of said red fluorescent dye and being selected from the group consisting of a polymethyne dye, an aryl carbonium dye and a Xanthene dye.
Claim 2
Dependent Claim
81 words
A homogeneous solution ink comprising a toner having a red fluorescent dye and a non-red visual dye belonging to the spectral sensitizer class of dyes disposed within a resin and dissolved in a polar organic solvent to form a solution, said non-red visual dye having the characteristic of occasioning a wave length shift of the fluorescent emission of said red fluorescent dye and being selected from the group consisting of a polymethyne dye, an aryl carbonium dye and a Xanthene dye.
Claim 3
Dependent Claim
8 words
The solution of claim 1 including a surfactant.
Claim 4
Dependent Claim
48 words
The homogeneous solution ink of claim 1 wherein said solution comprises: 10 to 40% soluble resin having 1% to 10% red fluorescent dye and 0.05% to 0.5% non-red visual dye of the spectral sensitizer class of dyes, 60 to 80% polar organic solvent, and 20% to 45% surfactant.
Claim 5
Dependent Claim
86 words
A homogeneous ink that emits a first color in white light and second color when subjected to ultraviolet light comprising: a resin containing 1 to 10% of fluorescent dye and 0.05 to 0.5% of a visual dye belonging to the spectral sensitizer class of dyes, said non-red visual dye having the characteristic of occasioning a wave length shift of the fluorescent emission of said red fluorescent dye and being selected from the group consisting of a polymethyne dye, an aryl carbonium dye and a Xanthene dye.
Claim 6
Dependent Claim
86 words
A homogeneous ink that emits a first color in white light and second color when subjected to ultraviolet light comprising: a resin containing 1 to 10% of fluorescent dye and 0.05 to 0.5% of a visual dye belonging to the spectral sensitizer class of dyes, said non-red visual dye having the characteristic of occasioning a wave length shift of the fluorescent emission of said red fluorescent dye and being selected from the group consisting of a polymethyne dye, an aryl carbonium dye and a Xanthene dye.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |