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# c12) United States Patent 

# Imamura et al. 

# (54) MAINTENANCE LIQUID FOR INKJET RECORDING, INK SET AND IMAGE FORMING METHOD 

(75) Inventors: Mika Imamura, Kanagawa (JP); Yoshimitsu Arai, Kanagawa (JP) 

(73) Assignee: FUJIFILM Corporation, Tokyo (JP) 

( *) Notice: Subject to any disclaimer, the term ofthis patent is extended or adjusted under 35 U.S.C. 154(b) by 261 days. 

(21) Appl. No.: 12/858,448 

Aug.18, 2010 (22) Filed: 

## (65) Prior Publication Data 

US 2011/0074866 Al Mar. 31, 2011 

## (30) Foreign Application Priority Data 

Sep. 28, 2009 (JP) ................................. 2009-222804 

(51) Int. Cl. C09D 11100 (2006.01) 

(52) U.S. Cl. .............. 347/96; 347/95; 347/98; 347/100; 106/31.13; 106/31.6 

(58) Field of Classification Search .................... 347/21, 347/28, 95-100; 523/160, 161; 106/31.13, 106/31.6 See application file for complete search history. 

<img src='content_image/943589.jpg'>

# (IO) Patent No.: US 8,393,724 B2 

# (45) Date of Patent: Mar.12,2013 

## (56) References Cited 

<img src='content_image/943579.jpg'>

## FOREIGN PATENT DOCUMENTS 

<img src='content_image/943580.jpg'>

* cited by examiner 

Primary Examiner - Matthew Luu 

Assistant Examiner - Rut Patel 

(74) Attorney, Agent, or Firm - SOLARIS Intellectual Property Group, PLLC 

## (57) ABSTRACT 

The present invention provides a maintenance liquid for ink› jet recording including at least water, an organic solvent, a basic compound and an acidic compound, and having pH of from 6.0 to 8.5. 

US008393724B2 

## U.S. PATENT DOCUMENTS 

## 12 Claims, No Drawings 

