IFI
Patent Intelligence & Technology Report
Class Distribution for 1990-1999
502 - CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF
OF MAKING (IPC B01J, C08F)
1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 Total
DEGUSSA DE
4 2 2 8 3 5 6 8 14 2 54
ENGELHARD CORP
8 1 3 5 6 3 5 8 7 4 50
RHONE-POULENC CHIMIE FR
1 3 4 3 3 3 6 3 6 1 33
IMPERIAL CHEMICAL INDUSTRIES LTD GB
1 1 1 1 3 2 1 5 8 1 24
IDEMITSU KOSAN CO LTD JP
1 1 0 1 3 3 3 2 1 1 16
ALBEMARLE CORP
2 1 1 2 3 0 0 0 0 0 9
SHOWA DENKO K K JP
0 1 0 3 2 0 0 0 2 0 8
CHISSO CORP JP
0 0 1 0 0 1 0 3 0 1 6
DSM N V NL
1 0 3 0 0 0 0 0 0 0 4
BOC GROUP INC THE
3 0 0 0 0 0 0 0 0 0 3
GAS RESEARCH INSTITUTE
0 0 0 0 1 0 0 0 0 2 3
PITTSBURGH, UNIVERSITY OF
0 0 0 1 0 0 1 0 1 0 3
ATLANTIC RICHFIELD CO
0 0 0 0 0 1 0 0 0 1 2
MITSUI MINING & SMELTING CO LTD JP
0 0 1 1 0 0 0 0 0 0 2
WACKER-CHEMIE GMBH DE
0 0 0 0 0 0 0 1 1 0 2
DAIKIN KOGYO CO LTD JP
0 1 0 0 0 0 0 0 0 0 1
HITACHI CHEMICAL CO LTD JP
0 0 0 0 0 0 1 0 0 0 1
IOWA STATE UNIVERSITY RESEARCH FOUNDATION INC
0 1 0 0 0 0 0 0 0 0 1
PPG INDUSTRIES INC
0 0 0 0 0 0 0 1 0 0 1
Total 21 12 16 25 24 18 23 31 40 13 223