Canon Japan has just filed a new lens patent on EF 58mm f/1.4 lens.
From Egami:
Patent Publication No. 2015-172611
Published 2015.10.1
Filing date 2014.3.11
Example 1
Focal length 57.99
F-number 1.45
Half angle (in degrees) 20.46
Image height 21.64
Overall length of the lens 117.64
BF 38.23
Read More: Canon Rumors