IFI
Patent Intelligence & Technology Report
Class Distribution for 1990-1999
252 - COMPOSITIONS (IPC C09K, H01B)
1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 Total
CHISSO CORP JP
17 22 16 5 6 7 14 19 17 20 143
IDEMITSU KOSAN CO LTD JP
2 2 1 3 5 5 9 1 4 3 35
PPG INDUSTRIES INC
3 6 1 2 1 2 8 0 4 8 35
DAIKIN KOGYO CO LTD JP
0 1 2 3 2 1 3 6 6 4 28
IMPERIAL CHEMICAL INDUSTRIES LTD GB
0 1 1 0 0 4 2 2 4 6 20
BETZDEARBORN INC
8 6 3 0 0 0 0 0 0 0 17
RHONE-POULENC CHIMIE FR
2 4 1 3 1 1 0 1 3 1 17
HITACHI CHEMICAL CO LTD JP
4 2 0 1 2 0 6 0 0 0 15
MITSUI MINING & SMELTING CO LTD JP
1 3 0 3 0 0 1 0 1 0 9
MORTON INTERNATIONAL INC
3 1 0 2 0 0 1 2 0 0 9
ALBEMARLE CORP
1 1 4 1 0 1 0 0 0 0 8
DEGUSSA DE
1 0 0 1 0 0 0 0 3 1 6
SHOWA DENKO K K JP
0 0 0 0 0 2 1 0 2 1 6
GAS RESEARCH INSTITUTE
1 1 1 1 0 0 0 1 0 0 5
NITTO DENKO CORP JP
0 2 0 1 0 0 1 0 1 0 5
HITACHI MAXELL LTD JP
2 0 1 0 0 0 0 0 1 0 4
JOHNSON, S C & SON INC
2 1 0 0 0 0 0 0 0 1 4
PENN STATE RESEARCH FOUNDATION THE
0 1 0 1 1 1 0 0 0 0 4
DSM N V NL
1 0 0 2 0 0 0 0 0 0 3
MASSACHUSETTS, UNIVERSITY OF
0 0 1 0 2 0 0 0 0 0 3
WACKER-CHEMIE GMBH DE
1 1 0 0 0 0 0 0 0 1 3
BAYERISCHE MOTOREN WERKE AG DE
0 1 0 0 0 0 0 0 0 0 1
FRANCE TELECOM S A FR
0 0 0 0 1 0 0 0 0 0 1
HARVARD COLLEGE, PRESIDENT & FELLOWS OF
0 0 0 0 0 0 0 0 1 0 1
HAYASHIBARA SEIBUTSU KAGAKU KENKYUJO K K JP
0 0 0 0 1 0 0 0 0 0 1
Total 49 56 32 29 22 24 46 32 47 46 383