US5091006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solution fluorescent inks
Assignee: Pitney Bowes Inc
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Filing: 1990-07-03
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Granted: 1992-02-25
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Expires: 2010-07-03
Abstract
Abstract A homogeneous fluorescent ink has been conceived that has particular use in devices such as inking components of postage meters. The inks are in the form of solutions, and contain a soluble fluorescent toner that is dissolved within a polar organic solvent. Additives can be used to modify the properties of the ink.
Inventors
- 👤 Thyagaraj Sarada
- 👤 Norman C. Hochwalt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:06
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
54 words
A homogeneous fluorescent ink for use with porous foam applicators, comprising: 10 to 50% soluble fluorescent resin toner, 50 to 85% polar organic solvent, not more than 5% dye, wherein said polar organic solvent has a boiling point greater than 250° C. and a vapor pressure less than 0.05 mm Hg at 25° C.
Claim 2
Dependent Claim
54 words
A homogeneous fluorescent ink for use with porous foam applicators, comprising: 10 to 50% soluble fluorescent resin toner, 50 to 85% polar organic solvent, not more than 5% dye, wherein said polar organic solvent has a boiling point greater than 250° C. and a vapor pressure less than 0.05 mm Hg at 25° C.
Claim 3
Dependent Claim
28 words
The fluorescent ink of claim 1 wherein said solvent is selected from the group consisting of triethylene glycol, glycerine, tripropylene glycol methyl-ether, tripropylene glycol and ethylene glycol phenyl-ether.
Claim 4
Dependent Claim
15 words
The fluorescent ink of claim 1 wherein said ink has a viscosity of 300-3000 cP.
Claim 5
Dependent Claim
24 words
A fluorescent ink comprising: 20% triethylene glycol, 20% glycerine, 10% ethylene glycol phenyl-ether, 20% tripropylene glycol methyl-ether, 25% fluorescent resin and 5% p-toluene sulfonamide.
Claim 6
Dependent Claim
24 words
A fluorescent ink comprising: 20% triethylene glycol, 20% glycerine, 10% ethylene glycol phenyl-ether, 20% tripropylene glycol methyl-ether, 25% fluorescent resin and 5% p-toluene sulfonamide.
Claim 7
Dependent Claim
24 words
A fluorescent ink comprising: 20% triethylene glycol, 20% glycerine, 10% ethylene glycol phenyl-ether, 20% triporpylene glycol methyl-ether, 25% fluorescent resin, and 5% p-toluene sulfonamide.
Claim 8
Dependent Claim
24 words
A fluorescent ink comprising: 20% triethylene glycol, 20% glycerine, 10% ethylene glycol phenyl-ether, 20% triporpylene glycol methyl-ether, 25% fluorescent resin, and 5% p-toluene sulfonamide.
Claim 9
Dependent Claim
19 words
A fluorescent ink, comprising: 3% viscosity modifier, 10% soluble fluorescent resin, 85% tripropylene glycol methyl-ether and 2% tributyl phosphate.
Claim 10
Dependent Claim
19 words
A fluorescent ink, comprising: 3% viscosity modifier, 10% soluble fluorescent resin, 85% tripropylene glycol methyl-ether and 2% tributyl phosphate.
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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) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |