IFI

203 - DISTILLATION: PROCESSES, SEPARATORY (IPC B01D)

       1999  1998  1997  1996  1995  1994  1993  1992  1991  1990  Total

GAS RESEARCH INSTITUTE
          0     1     0     3     0     0     0     0     0     0      4
ALBEMARLE CORP
          0     1     1     0     0     1     0     0     0     0      3
DAIKIN KOGYO CO LTD JP
          1     2     0     0     0     0     0     0     0     0      3
WACKER-CHEMIE GMBH DE
          1     0     0     0     0     1     1     0     0     0      3
ATLANTIC RICHFIELD CO
          0     0     0     0     0     2     0     0     0     0      2
BETZDEARBORN INC
          1     0     1     0     0     0     0     0     0     0      2
CHISSO CORP JP
          0     2     0     0     0     0     0     0     0     0      2
IMPERIAL CHEMICAL INDUSTRIES LTD GB
          1     0     0     0     0     0     1     0     0     0      2
DSM N V NL
          0     0     0     0     0     0     1     0     0     0      1
MASSACHUSETTS, UNIVERSITY OF
          0     0     0     0     0     0     0     0     1     0      1
RHONE-POULENC CHIMIE FR
          0     0     0     1     0     0     0     0     0     0      1
SHOWA DENKO K K JP
          0     0     1     0     0     0     0     0     0     0      1

Total     4     6     3     4     0     4     3     0     1     0     25