US6176908B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous ink jet inks for postal metering
Assignee: DuPont Electronics Inc
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Filing: 1999-09-20
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Granted: 2001-01-23
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Expires: 2019-09-20
Abstract
Abstract Aqueous, fluorescent red ink jet inks which meet US Postal Service requirements for metered mail are disclosed and comprise an aqueous vehicle, a red or magenta pigment, a polymeric dispersant, a fluorescent dye and, optionally a hydrotrope additive.
Inventors
- 👤 Richard D. Bauer
- 👤 John Morrow Gardner
- 👤 Loretta Ann Grezzo Page
- 👤 David Alvin Tyvoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:05
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
45 words
An ink jet ink composition comprising; a) an aqueous vehicle; b) at least one pigment selected from the group consisting of red pigments and magenta pigments; c) a polymeric dispersant; and d) a fluorescent dye; wherein said ink is suitable for use in metering mail.
Claim 2
Dependent Claim
45 words
An ink jet ink composition comprising; a) an aqueous vehicle; b) at least one pigment selected from the group consisting of red pigments and magenta pigments; c) a polymeric dispersant; and d) a fluorescent dye; wherein said ink is suitable for use in metering mail.
Claim 3
Dependent Claim
30 words
The ink of claim 1 , wherein said fluorescent dye is a red dye and wherein said ink futer comprises an additional dye selected from red dyes and yellow dyes.
Claim 4
Dependent Claim
16 words
The ink of claim 1 , wherein said ink further comprises at least one yellow pigment.
Claim 5
Dependent Claim
19 words
The ink of claim 1 , wherein the fluorescent dye and the polymeric dispersant have the same ionic character.
Claim 6
Dependent Claim
18 words
The ink of claim 1 , wherein the fluorescent dye and the polymeric dispersant have opposite ionic characters.
Claim 7
Dependent Claim
36 words
The ink of any of claims 1 , 2 , 3 , 4 , or 5 , wherein the polymeric dispersant is a structured polymer selected from the group consisting of block copolymers and graft copolymers.
Claim 8
Dependent Claim
64 words
The ink of any of claims 1 , 2 , 3 , 4 , or 5 , wherein said ink composition further comprises from 0.5 to 10% by weight, based on the weight of the ink composition, of a hydrotrope additive selected from the group consisting of sulfonated diphenyl ether hydrotropes, sulfonated naphthalene hydrotropes, carboxylated naphthalene hydrotropes, condensed naphthalene sulfonate polymers and combinations thereof.
Claim 9
Dependent Claim
53 words
The ink of claim 6 , wherein said ink composition further comprises from 0.5 to 10% by weight, based on the weight of the ink composition, of a hydrotrope additive selected from the group consisting of sulfonated diphenyl ether hydrotropes, sulfonated naphthalene hydrotropes, carboxylated naphthalene hydrotropes, condensed naphthalene sulfonate polymers and combinations thereof.
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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) | 2004-01-23 | 2004-07-24 | 2005-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-01-23 | 2008-07-24 | 2009-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-01-23 | 2012-07-24 | 2013-01-23 | $7700.00 | Window Closed / Lapsed |