Patent EP0304887B1 successfully refreshed from Google Patents.
EP0304887B1
Expired / Lapsed
EP
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Erasable ink compositions
Assignee: Sakura Color Products Corp
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Filing: 1988-08-24
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Granted: 1992-05-06
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Expires: 2008-08-24
Abstract
No abstract record available.
Inventors
- 👤 Kiyotaka Imagawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 21:54
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
An erasable ink composition for use in writing with a marking pen which comprises an organic solvent, optionally a resin soluble in the solvent, a pigment dispersed in the solvent and additives, the improvement in the additives comprising: (a) a fatty acid monoester of an aliphatic alcohol wherein the fatty acid has not less than six carbons in amounts of about 0,5-20 % by weight; (b) a fatty acid triglyceride in amounts of about 0,5-20 % by weight; (c) a higher aliphatic hydrocarbon which is liquid at normal temperatures in amounts of about 0,2-5 % by weight; and (d) a polyoxyethylene alkyl ether phosphoric acid ester in amounts of about 0,5-7 % by weight; each based on the ink composition.
Claim 2
Dependent Claim
23 words
The ink composition as claimed in claim 1 wherein the alcohol component in the fatty acid monoester has not less than two carbons.
Claim 3
Dependent Claim
23 words
The ink compositions as claimed in claim 1 wherein the alcohol component in the fatty acid monoester has not less than four carbons.
Claim 4
Dependent Claim
22 words
The ink composition as claimed in claim 1 wherein the fatty acid component in the triglyceride has not less than six carbons.
Claim 5
Dependent Claim
22 words
The ink composition as claimed in claim 1 wherein the fatty acid component in the triglyceride has not less than eight carbons.
Claim 6
Dependent Claim
16 words
The ink composition as claimed in claim 1 wherein the higher aliphatic hydrocarbon is liquid paraffin.
Claim 7
Dependent Claim
21 words
The ink composition as claimed in claim 1 wherein the solvent is an alcohol, a cellosolve® or a mixture of these.
References Cited (Backward Citations)
No citation records indexed.
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