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Date: October 18-21, 2026 - Location: Chicago, Illinois USA

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Our patents surface hardening and heat treatment technology

Expanite® Revolutionizing Hardening Solutions

Expanite holds patents in several countries. Below is a listing of our current patents. New patent applications are pending.

Reasonable efforts will be made to keep this webpage updated and continuously active, but this list may be unavailable from time to time without notice as part of maintenance, unintended outage or otherwise.

The inclusion, absence or omission of any patent or pending patent from this list shall not prevent the enforcement of any legal rights associated with such patent or pending patent.


A method of activating an article of passive ferrous or non-ferrous metal prior to carburising, nitriding and/or nitrocarburising.

Publication number: WO2011009463


Method for solution hardening of a cold deformed workpiece of a passive alloy, and a member soultuion hardened by the method

Publication number: WO2013159781


Lock washer

Publication number: WO2015173380


SuperExpanite Method for solution hardening of a cold deformed workpiece of a passive alloy, and a member solution hardened by the method.

Publication number: WO2012146254


Patent, Surface Hardening Expert

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