IFI
Patent Intelligence & Technology Report
Class Distribution for 1990-1999
528 - SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES
SERIES (IPC C08G)
1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 Total
RHONE-POULENC CHIMIE FR
0 6 5 0 3 6 1 10 12 18 61
WACKER-CHEMIE GMBH DE
8 7 6 3 9 5 6 3 2 5 54
IMPERIAL CHEMICAL INDUSTRIES LTD GB
1 4 1 2 2 2 4 4 7 11 38
CHISSO CORP JP
1 2 1 0 3 2 0 5 7 8 29
HITACHI CHEMICAL CO LTD JP
3 5 4 1 2 1 5 3 2 3 29
IDEMITSU KOSAN CO LTD JP
2 0 1 2 3 2 5 5 1 4 25
DSM N V NL
4 0 3 2 2 5 0 0 0 0 16
PPG INDUSTRIES INC
2 2 4 1 0 4 1 1 1 0 16
DEGUSSA DE
0 1 0 2 2 2 2 2 3 1 15
NITTO DENKO CORP JP
5 1 0 2 0 1 1 0 0 0 10
DAIKIN KOGYO CO LTD JP
2 2 0 0 0 0 2 1 0 2 9
MORTON INTERNATIONAL INC
2 3 1 0 1 0 1 1 0 0 9
PENN STATE RESEARCH FOUNDATION THE
3 1 1 3 1 0 0 0 0 0 9
MASSACHUSETTS, UNIVERSITY OF
0 2 0 0 1 2 0 2 1 0 8
SCHERING AG DE
0 0 0 0 0 0 1 1 1 2 5
SHOWA DENKO K K JP
0 1 1 1 0 0 0 1 0 1 5
JOHNSON, S C & SON INC
1 0 0 0 0 0 0 0 1 2 4
IOWA STATE UNIVERSITY RESEARCH FOUNDATION INC
0 0 0 0 0 0 0 1 0 2 3
NATIONAL RESEARCH COUNCIL OF CANADA CA
0 1 0 0 0 1 0 0 1 0 3
ALBEMARLE CORP
0 1 1 0 0 0 0 0 0 0 2
BETZDEARBORN INC
1 0 1 0 0 0 0 0 0 0 2
HITACHI MAXELL LTD JP
0 0 0 0 0 1 0 0 1 0 2
PLANCK-GESELL, MAX- ZUR FORDERUNG DER WISSENSCHAFTEN DE
0 0 1 0 0 1 0 0 0 0 2
ATLANTIC RICHFIELD CO
0 0 0 0 0 0 0 0 0 1 1
BOC GROUP INC THE
0 0 0 0 0 1 0 0 0 0 1
Total 35 39 31 19 29 36 29 40 40 60 358