I did find an Abcon Corporation in California, not N.J. They are a plastics molding and packaging company. Of course, it's after 5:00 PM there so nobody's answering the phone.
http://www.abconproducts.com/products/
Abcon was also a manufacturer of standard US Army injection-molded canteens manufactured after 1963, according to this Facebook thread:
https://www.facebook.com/canteensand...25710040853890
The CAGE code shows them to be a vendor other than manufacturer, with a cancelled status code.
https://www.cage-codes.com/cage-code-1A067-abcon-corp
Deeper and deeper down the rabbit hole.