This seems to be the line of work they are in. A snip from their last 8-k filed 11-12-1996:
COMPANY DATA: COMPANY CONFORMED NAME: CELLULAR PRODUCTS INC CENTRAL INDEX KEY: 0000718585 STANDARD INDUSTRIAL CLASSIFICATION: IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835] IRS NUMBER: 161183105 STATE OF INCORPORATION: NY FISCAL YEAR END: 1231
Ah! Thanks for letting me know that. I played CELP for the volume and momentum, but assumed it was a shell. Now you've filled in the missing part of the puzzle