[Cryptography] To what is Anderson referring here?

[John Levine]

>> It turned out that IBM had developed a scheme, called something like the Data Masking
>Facility, for expanding a 40-bit key into a 56-bit key for use with DES.
>
>Commercial Data Masking Facility - http://en.wikipedia.org/wiki/CDMF
>
>I came across it in PKCS #11, found it was patented, and crossed it
>of the list of things that might ever go in the product I was
>implementing at the time.
>
>I see CKM_CDMF_KEY_GEN is still in PKCS #11. I wonder if anyone
>outside IBM has ever supported it?
>http://docs.oasis-open.org/pkcs11/pkcs11-curr/v2.40/pkcs11-curr-v2.40.html

The patent expired in 2012. Is it still interesting?