US 9,541,834 B2  Page 2  (56)  References Cited  U.S. PATENT DOCUMENTS  FOREIGN PATENT DOCUMENTS  4,362,809  A  4,370,405  A  4,910,122 A  5,100,768  A  *  5,128,232  A  5,187,019 A  5,304,456  A  *  5,492,793  A  5,843,624  A  5,851,730  A  5,851,738  A  5,886,102  A  5,939,236  A  6,042,997  A  6,057,083  A  6,852,421 B2  7,968,268 B2  8,021,826 B2 *  8,067,148 B2  2009/0146322 Al  2009/0297784 Al *  2011/0274853 Al*  12/1982 Chen et al.  1/1983 O’Toole et al.  3/ 1990 Arnold et al.  3/ 1992  Niki  et al. ................. 430/281.1  7/1992 Thackeray et al.  2/1993 Calbo et al.  4/1994 Ueda et al. ................ 430/270.1  2/ 1996 Breyta et al.  12/1998 Houlihan et al.  12/1998 Thackeray et al.  12/1998 Thackeray et al.  3/1999 Sinta et al.  8/ 1999 Pavelchek et al.  3/2000 Barclay et  al.  5/2000 Taylor et al.  2/2005 Wayton et al.  6/2011 Wang  9/2011 Kim .  C09D 131/02  430/271.1  11/2011 Endou et al.  6/2009 Weling et al.  12/2009 Xu et al. ....................... 428/172  11/2011 Park et al. .................... 427/595  EP  WO  0232972 Bl  9003598 Al  9/1993  4/1990  * cited by examiner 