IFI
Patent Intelligence & Technology Report
Class Distribution for 1990-1999
522 - SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES
SERIES (IPC C08F, C08J)
1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 Total
DSM N V NL
6 2 1 0 4 0 1 0 0 0 14
RHONE-POULENC CHIMIE FR
0 1 3 1 0 0 0 1 0 0 6
HITACHI CHEMICAL CO LTD JP
0 0 0 0 1 0 0 1 2 1 5
AEROSPATIALE SOC NATIONALE INDUSTRIELLE FR
1 0 0 2 0 0 0 0 0 0 3
DAIKIN KOGYO CO LTD JP
0 0 0 0 0 0 1 2 0 0 3
IMPERIAL CHEMICAL INDUSTRIES LTD GB
0 0 1 0 0 1 0 0 0 1 3
NITTO DENKO CORP JP
0 0 1 1 1 0 0 0 0 0 3
WACKER-CHEMIE GMBH DE
0 0 0 0 0 0 1 0 1 1 3
CHISSO CORP JP
0 0 0 0 1 1 0 0 0 0 2
IDEMITSU KOSAN CO LTD JP
0 0 0 0 0 2 0 0 0 0 2
PPG INDUSTRIES INC
0 0 0 2 0 0 0 0 0 0 2
ALCON LABORATORIES INC
1 0 0 0 0 0 0 0 0 0 1
DEGUSSA DE
0 0 0 0 0 0 0 0 0 1 1
MORTON INTERNATIONAL INC
1 0 0 0 0 0 0 0 0 0 1
PENN STATE RESEARCH FOUNDATION THE
0 0 0 0 1 0 0 0 0 0 1
PITTSBURGH, UNIVERSITY OF
1 0 0 0 0 0 0 0 0 0 1
RELIANCE ELECTRIC INDUSTRIAL CO
0 1 0 0 0 0 0 0 0 0 1
SHOWA DENKO K K JP
0 1 0 0 0 0 0 0 0 0 1
Total 10 5 6 6 8 4 3 4 3 4 53