IFI
Patent Intelligence & Technology Report
Class Distribution for 1990-1999
523 - SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES
SERIES (IPC C08K, C08L, C09D)
1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 Total
PPG INDUSTRIES INC
0 2 2 0 3 3 3 2 1 2 18
IMPERIAL CHEMICAL INDUSTRIES LTD GB
0 0 0 2 0 1 2 1 9 2 17
HITACHI CHEMICAL CO LTD JP
2 0 1 0 0 2 0 0 2 0 7
DEGUSSA DE
1 0 0 0 0 0 3 2 0 0 6
MORTON INTERNATIONAL INC
1 2 3 0 0 0 0 0 0 0 6
DAIKIN KOGYO CO LTD JP
0 0 2 0 0 1 0 1 1 0 5
JOHNSON, S C & SON INC
0 0 0 0 0 0 2 1 0 1 4
RHONE-POULENC CHIMIE FR
0 1 1 0 1 0 0 1 0 0 4
WACKER-CHEMIE GMBH DE
1 1 1 0 0 1 0 0 0 0 4
CHISSO CORP JP
1 0 0 0 0 1 1 0 0 0 3
DUKE UNIVERSITY
0 0 0 0 0 1 1 0 0 0 2
IDEMITSU KOSAN CO LTD JP
0 1 0 0 0 0 1 0 0 0 2
SHOWA DENKO K K JP
1 0 0 0 0 0 0 1 0 0 2
AEROSPATIALE SOC NATIONALE INDUSTRIELLE FR
0 0 0 0 0 0 0 0 1 0 1
ALBEMARLE CORP
0 0 0 0 1 0 0 0 0 0 1
BETZDEARBORN INC
0 1 0 0 0 0 0 0 0 0 1
BOEHRINGER MANNHEIM GMBH DE
1 0 0 0 0 0 0 0 0 0 1
BORG-WARNER AUTOMOTIVE INC
0 0 1 0 0 0 0 0 0 0 1
ENGELHARD CORP
0 0 0 0 0 0 0 0 1 0 1
HITACHI MAXELL LTD JP
1 0 0 0 0 0 0 0 0 0 1
NITTO DENKO CORP JP
1 0 0 0 0 0 0 0 0 0 1
SCHERING AG DE
0 0 0 0 0 0 0 0 0 1 1
Total 10 8 11 2 5 10 13 9 15 6 89