End of Life
1987 EF 15mm f/2.8 Fisheye
1987 EF 28mm f/2.8
1987 EF 135mm f/2.8 with Softfocus
1988 EF 24mm f/2.8
1990 EF 35mm f/2
1990 EF 100-300mm f/4.5-5.6 USM
1998 EF 100-400mm f/4.5-5.6L IS USM
1999 EF 75-300mm f/4-5.6 III USM
1999 EF 75-300mm f/4-5.6 III
2001 EF 400mm f/4 DO IS USM
Series II, L upgrades & IS version
2010 EF 70-300mm f/4-5.6L IS USM
2011 EF 8-15mm f/4L Fisheye USM
2012 EF 24mm f/2.8 IS USM
2012 EF 28mm f/2.8 IS USM
2012 EF 35mm f/2 IS USM
2014 EF 400mm f/4 DO IS II USM
2014 EF 100-400mm f/4.5-5.6L IS II USM
Nearing end of life. Expect any of these lenses to be superseded in 2015
Zoom
1998 EF 28-135mm f/3.5-5.6 IS USM
2004 EF 70-300mm f/4.5-5.6 DO IS USM
Prime
1987 EF 50mm f/2.5 Compact Macro
1990 EF 50mm f/1.8 II
1991 EF 100mm f/2 USM
1991 TS-E 45mm f/2.8
1991 TS-E 90mm f/2.8
1992 EF 20mm f/2.8 USM
1992 EF 85mm f/1.8 USM
1993 EF 50mm f/1.4 USM
1995 EF 28mm f/1.8 USM
1999 MP-E 65mm f/2.8 1-5x Macro Photo
L lenses. Year cut off is 2002.
1993 EF 400mm f/5.6L USM
1995 EF 70-200mm f/2.8L USM
1996 EF 180mm f/3.5L Macro USM
1996 EF 135mm f/2L USM
1997 EF 300mm f/4L IS USM
1998 EF 35mm f/1.4L USM
1999 EF 70-200mm f/4L USM http://www.canonrumors.com/forum/index.php?topic=23614.msg46129