US4936916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink composition containing microcapsules
Assignee: New Oji Paper Co Ltd
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Filing: 1988-04-21
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Granted: 1990-06-26
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Expires: 2008-04-21
Abstract
Abstract A non-aqueous printing ink composition containing a microcapsule and a microencapsulated ink composition characterized in that the microcapsule has a capsule wall comprising melamine-formaldehyde resin and has an average particle size of 1.8 to 3.5 mu .
Inventors
- 👤 Kazuyuki Shinmitsu
- 👤 Shunsuke Shioi
- 👤 Makoto Miyake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:12
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/20; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
47 words
In an organic solvent type printing ink composition comprising a vehicle and microcapsules having at least one hydrophobic material encapsulated in the core thereof; the improvement which comprises said microcapsules having a capsule wall comprising melamine-formaldehyde resin, and having a particle size of 1.8 to 3.5 microns.
Claim 2
Dependent Claim
47 words
In an organic solvent type printing ink composition comprising a vehicle and microcapsules having at least one hydrophobic material encapsulated in the core thereof; the improvement which comprises said microcapsules having a capsule wall comprising melamine-formaldehyde resin, and having a particle size of 1.8 to 3.5 microns.
Claim 3
Dependent Claim
26 words
A microcapsule ink composition as claimed in claim 1 wherein the melamine-formaldehyde resin is formed by condensation of a melamine-formaldehyde resin precondensate in an aqueous medium.
Claim 4
Dependent Claim
40 words
A microcapsule ink composition as claimed in claim 2 wherein the melamine-formaldehyde resin precondensate is used in an amount of 3 to 50 parts by weight in term of melamine based on 100 parts by weight of the hydrophobic material.
Claim 5
Dependent Claim
40 words
A microcapsule ink composition as defined in claim 3 wherein the melamine-formaldehyde resin precondensate is used in an amount of 5 to 30 parts by weight in term of melamine based on 100 parts by weight of the hydrophobic material.
References Cited (Backward Citations)
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JPS57144788A
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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) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |