(45)  Date of Patent:  Mar.12,2013  (IO)  Patent No.:  US 8,393,724 B2  Imamura et al.  c12)  United States Patent  (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:  (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.  (56)  References Cited  U.S. PATENT DOCUMENTS  FOREIGN PATENT DOCUMENTS  (57)  ABSTRACT  12 Claims, No Drawings  (30)  Foreign Application Priority Data  (65)  Prior Publication Data  4,040,840  A  *  8/1977 Sugiyama et al . ............ 430/522  4,612,135  A  *  9/1986 Wenzel ......................... 510/423  4,880,725  A  *  11/1989 Hirai et al. .................... 430/373  5,811,131  A  *  9/1998 Mackles et al. ............... 424/683  5,825,380  A  *  10/1998 Ichizawa et al. ................ 347/28  6,604,809  B2 *  8/2003 Katsuragi et al. ............... 347/28  7,597,436  B2 *  10/2009 Momose et al. ................ 347/95  7,686,417  B2 *  3/2010 Ota ................................. 347/28  8,038,254  B2 *  10/2011  Arai et al. ....................... 347/28  2007/0132807  Al*  6/2007 Ota ................................. 347/22  2007/0134451  Al*  6/2007 Hakamada et al. ........ 428/32.38  2007 /0222811  Al*  9/2007 Yanagi ............................ 347/21  2007/0229577  Al*  10/2007 Morimoto ....................... 347/21  2010/0040782  Al*  2/2010 Arai et al. ..................... 427/256  2010/0203247  Al*  8/2010 Kariya et al. . ................ 427/256  2011/0050795  Al*  3/2011  Arai et al. ....................... 347/28  2011/0234692  Al*  9/2011  Haijima et al. ................. 347/28  JP  JP  2000-127419 A  2005-7703 A  5/2000  1/2005  * cited by examiner  Primary Examiner  - Matthew Luu  Assistant Examiner  - Rut Patel  (74)  Attorney, Agent, or Firm  - SOLARIS Intellectual  Property Group, PLLC  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.  Sep. 28, 2009  (JP) ................................. 2009-222804  US 2011/0074866 Al  Mar. 31, 2011  US008393724B2 